Watertight, crushproof, and dust proof. Easy open Double Throw latches. Open cell core with solid wall design - strong, light weight. O-ring seal. Automatic Pressure Equalization Valve. Stainless steel hardware. Pick ‘N’ Pluck with convoluted lid foam. Unconditional Lifetime Guarantee of Excellence. 1200 Case Certificates IP67 (1 meter submersion for 30 minutes)Def Stan 81-41/STANAG 4280.