diff --git a/CHANGELOG.next.toml b/CHANGELOG.next.toml
index 77a969b194..42e5b69a62 100644
--- a/CHANGELOG.next.toml
+++ b/CHANGELOG.next.toml
@@ -97,3 +97,15 @@ message = "[`Number`](https://docs.rs/aws-smithy-types/latest/aws_smithy_types/e
 references = ["smithy-rs#3294"]
 meta = { "breaking" = false, "tada" = false, "bug" = false, "target" = "all" }
 author = "rcoh"
+
+[[smithy-rs]]
+message = "Add support for constructing [`SdkBody`] and [`ByteStream`] from `http-body` 1.0 bodies. Note that this is initial support and works via a backwards compatibility shim to http-body 0.4. Hyper 1.0 is not supported."
+references = ["smithy-rs#3300", "aws-sdk-rust#977"]
+meta = { "breaking" = false, "tada" = true, "bug" = false, "target" = "all" }
+author = "rcoh"
+
+[[aws-sdk-rust]]
+message = "Add support for constructing [`SdkBody`] and [`ByteStream`] from `http-body` 1.0 bodies. Note that this is initial support and works via a backwards compatibility shim to http-body 0.4. Hyper 1.0 is not supported."
+references = ["smithy-rs#3300", "aws-sdk-rust#977"]
+meta = { "breaking" = false, "tada" = true, "bug" = false }
+author = "rcoh"
diff --git a/rust-runtime/aws-smithy-types/Cargo.toml b/rust-runtime/aws-smithy-types/Cargo.toml
index a46f9924fa..7118fb5dba 100644
--- a/rust-runtime/aws-smithy-types/Cargo.toml
+++ b/rust-runtime/aws-smithy-types/Cargo.toml
@@ -13,6 +13,7 @@ repository = "https://github.com/smithy-lang/smithy-rs"
 [features]
 byte-stream-poll-next = []
 http-body-0-4-x = ["dep:http-body-0-4"]
+http-body-1-x = ["dep:http-body-1-0", "dep:http-body-util", "dep:http-body-0-4", "dep:http-1x"]
 hyper-0-14-x = ["dep:hyper-0-14"]
 rt-tokio = [
     "dep:http-body-0-4",
@@ -32,7 +33,10 @@ base64-simd = "0.8"
 bytes = "1"
 bytes-utils = "0.1"
 http = "0.2.3"
+http-1x = { package = "http", version = "1", optional = true }
 http-body-0-4 = { package = "http-body", version = "0.4.4", optional = true }
+http-body-1-0 = { package = "http-body", version = "1", optional = true }
+http-body-util = { version = "0.1.0", optional = true }
 hyper-0-14 = { package = "hyper", version = "0.14.26", optional = true }
 itoa = "1.0.0"
 num-integer = "0.1.44"
diff --git a/rust-runtime/aws-smithy-types/additional-ci b/rust-runtime/aws-smithy-types/additional-ci
index 2d9305d510..7ce1a378ac 100755
--- a/rust-runtime/aws-smithy-types/additional-ci
+++ b/rust-runtime/aws-smithy-types/additional-ci
@@ -12,3 +12,6 @@ cargo tree -d --edges normal --all-features
 
 echo "### Checking whether the features are properly feature-gated"
 ! cargo tree -e no-dev | grep serde
+
+echo "### Checking feature powerset"
+cargo hack check --feature-powerset --exclude-all-features
diff --git a/rust-runtime/aws-smithy-types/src/body.rs b/rust-runtime/aws-smithy-types/src/body.rs
index 33e5912a93..9798524387 100644
--- a/rust-runtime/aws-smithy-types/src/body.rs
+++ b/rust-runtime/aws-smithy-types/src/body.rs
@@ -19,6 +19,8 @@ use std::task::{Context, Poll};
 /// The name has a suffix `_x` to avoid name collision with a third-party `http-body-0-4`.
 #[cfg(feature = "http-body-0-4-x")]
 pub mod http_body_0_4_x;
+#[cfg(feature = "http-body-1-x")]
+pub mod http_body_1_x;
 
 /// A generic, boxed error that's `Send` and `Sync`
 pub type Error = Box<dyn StdError + Send + Sync>;
@@ -55,7 +57,13 @@ impl Debug for SdkBody {
 
 /// A boxed generic HTTP body that, when consumed, will result in [`Bytes`] or an [`Error`].
 enum BoxBody {
-    #[cfg(feature = "http-body-0-4-x")]
+    // This is enabled by the **dependency**, not the feature. This allows us to construct it
+    // whenever we have the dependency and keep the APIs private
+    #[cfg(any(
+        feature = "http-body-0-4-x",
+        feature = "http-body-1-x",
+        feature = "rt-tokio"
+    ))]
     HttpBody04(http_body_0_4::combinators::BoxBody<Bytes, Error>),
 }
 
@@ -162,6 +170,27 @@ impl SdkBody {
         }
     }
 
+    #[cfg(any(
+        feature = "http-body-0-4-x",
+        feature = "http-body-1-x",
+        feature = "rt-tokio"
+    ))]
+    pub(crate) fn from_body_0_4_internal<T, E>(body: T) -> Self
+    where
+        T: http_body_0_4::Body<Data = Bytes, Error = E> + Send + Sync + 'static,
+        E: Into<Error> + 'static,
+    {
+        Self {
+            inner: Inner::Dyn {
+                inner: BoxBody::HttpBody04(http_body_0_4::combinators::BoxBody::new(
+                    body.map_err(Into::into),
+                )),
+            },
+            rebuild: None,
+            bytes_contents: None,
+        }
+    }
+
     #[cfg(feature = "http-body-0-4-x")]
     pub(crate) fn poll_next_trailers(
         self: Pin<&mut Self>,
diff --git a/rust-runtime/aws-smithy-types/src/body/http_body_0_4_x.rs b/rust-runtime/aws-smithy-types/src/body/http_body_0_4_x.rs
index a6719d1fa2..d4eae4cf4c 100644
--- a/rust-runtime/aws-smithy-types/src/body/http_body_0_4_x.rs
+++ b/rust-runtime/aws-smithy-types/src/body/http_body_0_4_x.rs
@@ -3,11 +3,13 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-use crate::body::{BoxBody, Error, Inner, SdkBody};
-use bytes::Bytes;
 use std::pin::Pin;
 use std::task::{Context, Poll};
 
+use bytes::Bytes;
+
+use crate::body::{Error, SdkBody};
+
 impl SdkBody {
     /// Construct an `SdkBody` from a type that implements [`http_body_0_4::Body<Data = Bytes>`](http_body_0_4::Body).
     ///
@@ -17,15 +19,7 @@ impl SdkBody {
         T: http_body_0_4::Body<Data = Bytes, Error = E> + Send + Sync + 'static,
         E: Into<Error> + 'static,
     {
-        Self {
-            inner: Inner::Dyn {
-                inner: BoxBody::HttpBody04(http_body_0_4::combinators::BoxBody::new(
-                    body.map_err(Into::into),
-                )),
-            },
-            rebuild: None,
-            bytes_contents: None,
-        }
+        SdkBody::from_body_0_4_internal(body)
     }
 }
 
diff --git a/rust-runtime/aws-smithy-types/src/body/http_body_1_x.rs b/rust-runtime/aws-smithy-types/src/body/http_body_1_x.rs
new file mode 100644
index 0000000000..6b3278d987
--- /dev/null
+++ b/rust-runtime/aws-smithy-types/src/body/http_body_1_x.rs
@@ -0,0 +1,267 @@
+/*
+ * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+//! Adapters to use http-body 1.0 bodies with SdkBody & ByteStream
+
+use std::pin::Pin;
+use std::task::{ready, Context, Poll};
+
+use bytes::Bytes;
+use http_body_util::BodyExt;
+use pin_project_lite::pin_project;
+
+use crate::body::{Error, SdkBody};
+
+impl SdkBody {
+    /// Construct an `SdkBody` from a type that implements [`http_body_1_0::Body<Data = Bytes>`](http_body_1_0::Body).
+    pub fn from_body_1_x<T, E>(body: T) -> Self
+    where
+        T: http_body_1_0::Body<Data = Bytes, Error = E> + Send + Sync + 'static,
+        E: Into<Error> + 'static,
+    {
+        SdkBody::from_body_0_4_internal(Http1toHttp04::new(body.map_err(Into::into)))
+    }
+}
+
+pin_project! {
+    struct Http1toHttp04<B> {
+        #[pin]
+        inner: B,
+        trailers: Option<http_1x::HeaderMap>,
+    }
+}
+
+impl<B> Http1toHttp04<B> {
+    fn new(inner: B) -> Self {
+        Self {
+            inner,
+            trailers: None,
+        }
+    }
+}
+
+impl<B> http_body_0_4::Body for Http1toHttp04<B>
+where
+    B: http_body_1_0::Body,
+{
+    type Data = B::Data;
+    type Error = B::Error;
+
+    fn poll_data(
+        mut self: Pin<&mut Self>,
+        cx: &mut Context<'_>,
+    ) -> Poll<Option<Result<Self::Data, Self::Error>>> {
+        loop {
+            let this = self.as_mut().project();
+            match ready!(this.inner.poll_frame(cx)) {
+                Some(Ok(frame)) => {
+                    let frame = match frame.into_data() {
+                        Ok(data) => return Poll::Ready(Some(Ok(data))),
+                        Err(frame) => frame,
+                    };
+                    // when we get a trailers frame, store the trailers for the next poll
+                    if let Ok(trailers) = frame.into_trailers() {
+                        this.trailers.replace(trailers);
+                        return Poll::Ready(None);
+                    };
+                    // if the frame type was unknown, discard it. the next one might be something
+                    // useful
+                }
+                Some(Err(e)) => return Poll::Ready(Some(Err(e))),
+                None => return Poll::Ready(None),
+            }
+        }
+    }
+
+    fn poll_trailers(
+        self: Pin<&mut Self>,
+        _cx: &mut Context<'_>,
+    ) -> Poll<Result<Option<http::HeaderMap>, Self::Error>> {
+        // all of the polling happens in poll_data, once we get to the trailers we've actually
+        // already read everything
+        let this = self.project();
+        match this.trailers.take() {
+            Some(headers) => Poll::Ready(Ok(Some(convert_header_map(headers)))),
+            None => Poll::Ready(Ok(None)),
+        }
+    }
+
+    fn is_end_stream(&self) -> bool {
+        self.inner.is_end_stream()
+    }
+
+    fn size_hint(&self) -> http_body_0_4::SizeHint {
+        let mut size_hint = http_body_0_4::SizeHint::new();
+        let inner_hint = self.inner.size_hint();
+        if let Some(exact) = inner_hint.exact() {
+            size_hint.set_exact(exact);
+        } else {
+            size_hint.set_lower(inner_hint.lower());
+            if let Some(upper) = inner_hint.upper() {
+                size_hint.set_upper(upper);
+            }
+        }
+        size_hint
+    }
+}
+
+fn convert_header_map(input: http_1x::HeaderMap) -> http::HeaderMap {
+    let mut map = http::HeaderMap::with_capacity(input.capacity());
+    let mut mem: Option<http_1x::HeaderName> = None;
+    for (k, v) in input.into_iter() {
+        let name = k.or_else(|| mem.clone()).unwrap();
+        map.append(
+            http::HeaderName::from_bytes(name.as_str().as_bytes()).expect("already validated"),
+            http::HeaderValue::from_bytes(v.as_bytes()).expect("already validated"),
+        );
+        mem = Some(name);
+    }
+    map
+}
+
+#[cfg(test)]
+mod test {
+    use std::collections::VecDeque;
+    use std::pin::Pin;
+    use std::task::{Context, Poll};
+
+    use bytes::Bytes;
+    use http::header::{CONTENT_LENGTH as CL0, CONTENT_TYPE as CT0};
+    use http_1x::header::{CONTENT_LENGTH as CL1, CONTENT_TYPE as CT1};
+    use http_1x::{HeaderMap, HeaderName, HeaderValue};
+    use http_body_1_0::Frame;
+
+    use crate::body::http_body_1_x::convert_header_map;
+    use crate::body::{Error, SdkBody};
+    use crate::byte_stream::ByteStream;
+
+    struct TestBody {
+        chunks: VecDeque<Chunk>,
+    }
+
+    enum Chunk {
+        Data(&'static str),
+        Error(&'static str),
+        Trailers(HeaderMap),
+    }
+
+    impl http_body_1_0::Body for TestBody {
+        type Data = Bytes;
+        type Error = Error;
+
+        fn poll_frame(
+            mut self: Pin<&mut Self>,
+            _cx: &mut Context<'_>,
+        ) -> Poll<Option<Result<Frame<Self::Data>, Self::Error>>> {
+            let next = self.chunks.pop_front();
+            let mk = |v: Frame<Bytes>| Poll::Ready(Some(Ok(v)));
+
+            match next {
+                Some(Chunk::Data(s)) => mk(Frame::data(Bytes::from_static(s.as_bytes()))),
+                Some(Chunk::Trailers(headers)) => mk(Frame::trailers(headers)),
+                Some(Chunk::Error(err)) => Poll::Ready(Some(Err(err.into()))),
+                None => Poll::Ready(None),
+            }
+        }
+    }
+
+    fn trailers() -> HeaderMap {
+        let mut map = HeaderMap::new();
+        map.insert(
+            HeaderName::from_static("x-test"),
+            HeaderValue::from_static("x-test-value"),
+        );
+        map.append(
+            HeaderName::from_static("x-test"),
+            HeaderValue::from_static("x-test-value-2"),
+        );
+        map.append(
+            HeaderName::from_static("y-test"),
+            HeaderValue::from_static("y-test-value-2"),
+        );
+        map
+    }
+
+    #[tokio::test]
+    async fn test_body_with_trailers() {
+        let body = TestBody {
+            chunks: vec![
+                Chunk::Data("123"),
+                Chunk::Data("456"),
+                Chunk::Data("789"),
+                Chunk::Trailers(trailers()),
+            ]
+            .into(),
+        };
+        let body = SdkBody::from_body_1_x(body);
+        let data = ByteStream::new(body);
+        assert_eq!(data.collect().await.unwrap().to_vec(), b"123456789");
+    }
+
+    #[tokio::test]
+    async fn test_read_trailers() {
+        let body = TestBody {
+            chunks: vec![
+                Chunk::Data("123"),
+                Chunk::Data("456"),
+                Chunk::Data("789"),
+                Chunk::Trailers(trailers()),
+            ]
+            .into(),
+        };
+        let mut body = SdkBody::from_body_1_x(body);
+        while let Some(_data) = http_body_0_4::Body::data(&mut body).await {}
+        assert_eq!(
+            http_body_0_4::Body::trailers(&mut body).await.unwrap(),
+            Some(convert_header_map(trailers()))
+        );
+    }
+
+    #[tokio::test]
+    async fn test_errors() {
+        let body = TestBody {
+            chunks: vec![
+                Chunk::Data("123"),
+                Chunk::Data("456"),
+                Chunk::Data("789"),
+                Chunk::Error("errors!"),
+            ]
+            .into(),
+        };
+
+        let body = SdkBody::from_body_1_x(body);
+        let body = ByteStream::new(body);
+        body.collect().await.expect_err("body returned an error");
+    }
+    #[tokio::test]
+    async fn test_no_trailers() {
+        let body = TestBody {
+            chunks: vec![Chunk::Data("123"), Chunk::Data("456"), Chunk::Data("789")].into(),
+        };
+
+        let body = SdkBody::from_body_1_x(body);
+        let body = ByteStream::new(body);
+        assert_eq!(body.collect().await.unwrap().to_vec(), b"123456789");
+    }
+
+    #[test]
+    fn test_convert_headers() {
+        let mut http1_headermap = http_1x::HeaderMap::new();
+        http1_headermap.append(CT1, HeaderValue::from_static("a"));
+        http1_headermap.append(CT1, HeaderValue::from_static("b"));
+        http1_headermap.append(CT1, HeaderValue::from_static("c"));
+
+        http1_headermap.insert(CL1, HeaderValue::from_static("1234"));
+
+        let mut expect = http::HeaderMap::new();
+        expect.append(CT0, http::HeaderValue::from_static("a"));
+        expect.append(CT0, http::HeaderValue::from_static("b"));
+        expect.append(CT0, http::HeaderValue::from_static("c"));
+
+        expect.insert(CL0, http::HeaderValue::from_static("1234"));
+
+        assert_eq!(convert_header_map(http1_headermap), expect);
+    }
+}
diff --git a/rust-runtime/aws-smithy-types/src/byte_stream.rs b/rust-runtime/aws-smithy-types/src/byte_stream.rs
index 2721b1b6b2..3acb18b562 100644
--- a/rust-runtime/aws-smithy-types/src/byte_stream.rs
+++ b/rust-runtime/aws-smithy-types/src/byte_stream.rs
@@ -148,6 +148,8 @@ pub use self::bytestream_util::FsBuilder;
 /// The name has a suffix `_x` to avoid name collision with a third-party `http-body-0-4`.
 #[cfg(feature = "http-body-0-4-x")]
 pub mod http_body_0_4_x;
+#[cfg(feature = "http-body-1-x")]
+pub mod http_body_1_x;
 
 pin_project! {
     /// Stream of binary data
diff --git a/rust-runtime/aws-smithy-types/src/byte_stream/bytestream_util.rs b/rust-runtime/aws-smithy-types/src/byte_stream/bytestream_util.rs
index 39965c90c5..2ed7341eeb 100644
--- a/rust-runtime/aws-smithy-types/src/byte_stream/bytestream_util.rs
+++ b/rust-runtime/aws-smithy-types/src/byte_stream/bytestream_util.rs
@@ -193,7 +193,7 @@ impl FsBuilder {
             let body_loader = move || {
                 // If an offset was provided, seeking will be handled in `PathBody::poll_data` each
                 // time the file is loaded.
-                SdkBody::from_body_0_4(PathBody::from_path(
+                SdkBody::from_body_0_4_internal(PathBody::from_path(
                     path.clone(),
                     length,
                     buffer_size,
@@ -208,7 +208,8 @@ impl FsBuilder {
                 let _s = file.seek(io::SeekFrom::Start(offset)).await?;
             }
 
-            let body = SdkBody::from_body_0_4(PathBody::from_file(file, length, buffer_size));
+            let body =
+                SdkBody::from_body_0_4_internal(PathBody::from_file(file, length, buffer_size));
 
             Ok(ByteStream::new(body))
         } else {
diff --git a/rust-runtime/aws-smithy-types/src/byte_stream/http_body_1_x.rs b/rust-runtime/aws-smithy-types/src/byte_stream/http_body_1_x.rs
new file mode 100644
index 0000000000..bff8b201eb
--- /dev/null
+++ b/rust-runtime/aws-smithy-types/src/byte_stream/http_body_1_x.rs
@@ -0,0 +1,21 @@
+/*
+ * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+//! Adapters to use http-body 1.0 bodies with SdkBody & ByteStream
+
+use crate::body::SdkBody;
+use crate::byte_stream::ByteStream;
+use bytes::Bytes;
+
+impl ByteStream {
+    /// Construct a `ByteStream` from a type that implements [`http_body_1_0::Body<Data = Bytes>`](http_body_1_0::Body).
+    pub fn from_body_1_x<T, E>(body: T) -> Self
+    where
+        T: http_body_1_0::Body<Data = Bytes, Error = E> + Send + Sync + 'static,
+        E: Into<crate::body::Error> + 'static,
+    {
+        ByteStream::new(SdkBody::from_body_1_x(body))
+    }
+}