diff --git a/data/json/materials.json b/data/json/materials.json
index e49b122ebb36c..5563bc4206292 100644
--- a/data/json/materials.json
+++ b/data/json/materials.json
@@ -11,7 +11,7 @@
     "dmg_adj": [ "scratched", "cut", "cracked", "shattered" ],
     "bash_dmg_verb": "dented",
     "cut_dmg_verb": "gouged",
-    "resist": { "bash": 4, "cut": 6, "acid": 10, "heat": 6, "bullet": 6 }
+    "resist": { "bash": 4, "cut": 5, "acid": 10, "heat": 6, "bullet": 3 }
   },
   {
     "type": "material",
@@ -885,7 +885,7 @@
       { "fuel": 0, "smoke": 0, "burn": 1000, "volume_per_turn": "5000 ml", "//": "More like shattering than melting" }
     ],
     "burn_products": [ [ "glass_shard", 0.5 ] ],
-    "resist": { "bash": 3, "cut": 4, "acid": 10, "heat": 3, "bullet": 3 },
+    "resist": { "bash": 3, "cut": 4, "acid": 10, "heat": 3, "bullet": 1 },
     "repair_difficulty": 7
   },
   {
@@ -907,7 +907,7 @@
       { "fuel": 0, "smoke": 0, "burn": 1000, "volume_per_turn": "5000 ml", "//": "More like shattering than melting" }
     ],
     "burn_products": [ [ "glass_shard", 0.5 ] ],
-    "resist": { "bash": 3, "cut": 4, "acid": 10, "heat": 3, "bullet": 3 }
+    "resist": { "bash": 3, "cut": 4, "acid": 10, "heat": 3, "bullet": 1 }
   },
   {
     "type": "material",
@@ -1509,6 +1509,7 @@
     "id": "plastic",
     "name": "Plastic",
     "//": "Most common plastics are around 1",
+    "//2": "This one represents various non-resistant household plastics, found in your pen, keyboard, charger etc.",
     "density": 1.0,
     "specific_heat_liquid": 1.6,
     "specific_heat_solid": 1.6,
@@ -1526,9 +1527,27 @@
       { "fuel": 0.4, "smoke": 3, "burn": 0.003 },
       { "fuel": 1, "smoke": 5, "burn": 0.008 }
     ],
-    "resist": { "bash": 2, "cut": 2, "acid": 9, "heat": 1, "bullet": 2 },
+    "resist": { "bash": 2, "cut": 2, "acid": 9, "heat": 1, "bullet": 1 },
     "repair_difficulty": 3
   },
+  {
+    "type": "material",
+    "id": "hard_plastic_transp",
+    "copy-from": "plastic",
+    "name": "Transparent Impact Resistant Plastic",
+    "//2": "This one represents various transparent impact-resistant plastics, like polycarbonate.  Prime material for visors and safety goggles.",
+    "resist": { "bash": 4, "cut": 3, "acid": 9, "heat": 1, "bullet": 1.5 },
+    "repair_difficulty": 4
+  },
+  {
+    "type": "material",
+    "id": "composite_transp",
+    "copy-from": "plastic",
+    "name": "Transparent Bullet Resistant Composite",
+    "//2": "This one represents specialised transparent bulletproof composites, mostly employed on military vehicles and in high-value construction (banks).",
+    "resist": { "bash": 5, "cut": 4, "acid": 9, "heat": 1, "bullet": 2 },
+    "repair_difficulty": 5
+  },
   {
     "type": "material",
     "id": "plastic_pad",
@@ -1548,7 +1567,7 @@
       { "fuel": 0.4, "smoke": 3, "burn": 0.003 },
       { "fuel": 1, "smoke": 5, "burn": 0.008 }
     ],
-    "resist": { "bash": 0.75, "cut": 0.5, "acid": 9, "heat": 1, "bullet": 0.5 },
+    "resist": { "bash": 1, "cut": 0.5, "acid": 9, "heat": 1, "bullet": 0.5 },
     "repair_difficulty": 5
   },
   {
diff --git a/tests/coverage_test.cpp b/tests/coverage_test.cpp
index 1a2c355d3c5fd..e0d20dc4866eb 100644
--- a/tests/coverage_test.cpp
+++ b/tests/coverage_test.cpp
@@ -187,7 +187,7 @@ TEST_CASE( "Ranged_coverage_vs_bullet", "[coverage] [ranged]" )
 {
     SECTION( "Full melee and ranged coverage vs. ranged attack" ) {
         const float dmg = get_avg_bullet_dmg( "test_hazmat_suit" );
-        check_near( "Average damage", dmg, 13.6f, 0.2f );
+        check_near( "Average damage", dmg, 15.4f, 0.2f );
     }
 
     SECTION( "No ranged coverage vs. ranged attack" ) {
diff --git a/tests/iteminfo_test.cpp b/tests/iteminfo_test.cpp
index fe7cd5386b326..462ff1d4c2d1d 100644
--- a/tests/iteminfo_test.cpp
+++ b/tests/iteminfo_test.cpp
@@ -1279,11 +1279,11 @@ TEST_CASE( "armor_protection", "[iteminfo][armor][protection]" )
 
     SECTION( "moderate protection from physical and environmental damage" ) {
         // Hazmat suit, material:plastic, thickness:2
-        // 2/2/2 bash/cut/bullet x 2 thickness
+        // 2/2/1 bash/cut/bullet x 2 thickness
         // 9/1/20 acid/fire/env
         item hazmat( "test_hazmat_suit" );
         REQUIRE( hazmat.get_covered_body_parts().any() );
-        expected_armor_values( hazmat, 4, 4, 3.2, 4, 9, 1, 20 );
+        expected_armor_values( hazmat, 4, 4, 3.2, 2, 9, 1, 20 );
 
         // Protection info displayed on two lines
         CHECK( item_info_str( hazmat, protection ) ==
@@ -1294,7 +1294,7 @@ TEST_CASE( "armor_protection", "[iteminfo][armor][protection]" )
                "<color_c_white>Protection</color>:\n"
                "  Bash: <color_c_yellow>4.00</color>\n"
                "  Cut: <color_c_yellow>4.00</color>\n"
-               "  Ballistic: <color_c_yellow>4.00</color>\n"
+               "  Ballistic: <color_c_yellow>2.00</color>\n"
                "  Pierce: <color_c_yellow>3.20</color>\n"
                "  Acid: <color_c_yellow>9.00</color>\n"
                "  Fire: <color_c_yellow>1.00</color>\n"