diff --git a/data/json/items/armor/suits_protection.json b/data/json/items/armor/suits_protection.json
index 0557291696e42..79742e989f726 100644
--- a/data/json/items/armor/suits_protection.json
+++ b/data/json/items/armor/suits_protection.json
@@ -1380,6 +1380,7 @@
         "encumbrance": 6,
         "coverage": 75,
         "covers": [ "torso" ],
+        "volume_encumber_modifier": 0.3,
         "material": [
           { "type": "plastic_pad", "covered_by_mat": 100, "thickness": 7 },
           { "type": "thermo_resin", "covered_by_mat": 90, "thickness": 1.75 }
@@ -1387,6 +1388,7 @@
       },
       {
         "covers": [ "arm_l", "arm_r", "leg_l", "leg_r" ],
+        "volume_encumber_modifier": 0,
         "encumbrance": 4,
         "coverage": 90,
         "material": [
@@ -1397,6 +1399,7 @@
       },
       {
         "covers": [ "arm_l", "arm_r", "leg_l", "leg_r", "foot_l", "foot_r" ],
+        "volume_encumber_modifier": 0,
         "coverage": 65,
         "material": [
           { "type": "plastic_pad", "covered_by_mat": 100, "thickness": 5 },
@@ -1406,6 +1409,7 @@
       },
       {
         "covers": [ "foot_l", "foot_r" ],
+        "volume_encumber_modifier": 0,
         "encumbrance": 2,
         "coverage": 75,
         "material": [ { "type": "thermo_resin", "covered_by_mat": 100, "thickness": 1.5 } ],
@@ -1413,6 +1417,7 @@
       },
       {
         "covers": [ "leg_l", "leg_r" ],
+        "volume_encumber_modifier": 0,
         "coverage": 30,
         "material": [ { "type": "plastic_pad", "covered_by_mat": 100, "thickness": 7 } ],
         "specifically_covers": [ "leg_hip_l", "leg_hip_r" ]