The SKB Dry-Tek Handgun / Pistol Bags feature the patented ""Dry-Tek Difference"". The two-layer padding will work in tandem to draw moisture from the inner bag. The inner pad layer enables water to pass through to the outer layer where a remarkable one-way laminate membrane applied to the outer layer allows water molecules to exit the bag"" but not to enter. The result"" your gun stays dry!