diff --git a/data/json/items/armor/ballistic_armor.json b/data/json/items/armor/ballistic_armor.json
index 6a7aa7f2a38d8..48567c5fad332 100644
--- a/data/json/items/armor/ballistic_armor.json
+++ b/data/json/items/armor/ballistic_armor.json
@@ -16,7 +16,7 @@
     "coverage": 85,
     "encumbrance": 10,
     "warmth": 15,
-    "material_thickness": 20,
+    "material_thickness": 7,
     "flags": [ "STURDY", "OUTER", "WATER_FRIENDLY" ]
   }
 ]