Specifications:- Liner Thickness: 1/4" (0.7 cm)- Cheek Pad Thickness: 1" (2.6 cm)- Material: Polyester Fabric, Sponge- Net Weight: 0.29 Lbs (0.13 kg). Package Contents:- 1x Liner- 2x Cheek Pads. Notice: - 1.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 re-installing them to avoid dampness or mildew.- 2.Due to the elasticity of the material, the thickness will be slightly higher than the parameter.