Specifications:- Liner Thickness: 3/8"" (0.9 cm)- Cheek Pad Thickness: 1"" (2.6 cm)- Material: Polyester Fabric, Sponge- Net Weight: 0.23 Lbs (0.105 kg). Package Contents:- 1x Liner- 2x Cheek Pads. Notice: - Please don't throw your helmet's liner and cheek pads in the washer or dryer. Wash them carefully with hands. Let them air dry 24 hours before reinstalling them to avoid dampness or mildew.- Due to the elasticity of the material, the thickness will be slightly higher than the parameter.