diff --git a/crates/fj-core/src/operations/sweep/face.rs b/crates/fj-core/src/operations/sweep/face.rs
index bef57f79f..ac33f810b 100644
--- a/crates/fj-core/src/operations/sweep/face.rs
+++ b/crates/fj-core/src/operations/sweep/face.rs
@@ -15,7 +15,7 @@ use super::{SweepCache, SweepRegion};
 ///
 /// [module documentation]: super
 pub trait SweepFace {
-    /// # Sweep the [`Face`]
+    /// # Sweep the [`Face`] into a [`Shell`]
     fn sweep_face(
         &self,
         path: impl Into<Vector<3>>,
@@ -51,12 +51,12 @@ impl SweepFace for Handle<Face> {
         let bottom_face = self.clone();
         faces.push(bottom_face.clone());
 
-        let side_faces = bottom_face
+        let other_faces = bottom_face
             .region()
             .sweep_region(bottom_face.surface(), path, cache, core)
             .all_faces()
             .map(|side_face| side_face.insert(&mut core.services));
-        faces.extend(side_faces);
+        faces.extend(other_faces);
 
         Shell::new(faces)
     }
diff --git a/crates/fj-core/src/operations/sweep/region.rs b/crates/fj-core/src/operations/sweep/region.rs
index 700d9deb1..bc54c7148 100644
--- a/crates/fj-core/src/operations/sweep/region.rs
+++ b/crates/fj-core/src/operations/sweep/region.rs
@@ -60,21 +60,21 @@ impl SweepRegion for Region {
             core,
         );
 
-        let mut top_interiors = Vec::new();
-
-        for bottom_cycle in self.interiors() {
-            let top_cycle = sweep_cycle(
-                bottom_cycle,
-                surface,
-                self.color(),
-                &mut faces,
-                path,
-                cache,
-                core,
-            );
-
-            top_interiors.push(top_cycle);
-        }
+        let top_interiors = self
+            .interiors()
+            .iter()
+            .map(|bottom_cycle| {
+                sweep_cycle(
+                    bottom_cycle,
+                    surface,
+                    self.color(),
+                    &mut faces,
+                    path,
+                    cache,
+                    core,
+                )
+            })
+            .collect::<Vec<_>>();
 
         let top_face = {
             let top_surface = surface