IMPORTANT NOTE: If you have a Shadowmatt, Glossy, or Dark Line helmet (regular brim or Miss) - pick the Shadowmatt liner. If you have a Premium helmet (regular brim or Miss) - pick the Premium liner. Samshield helmets are sold by shell size (S, M, L, XL) and an appropriately sized liner must be selected separately. Samshield helmets have so many great features, including the ability to change the interior liner. Samshield liners are sized to create an individual fit for the rider. Memory foam material means the fit is incredibly comfortable and conforms to your head shape perfectly, without pressure points or discomfort. Easy to snap in and out of the helmet for switching liners or cleaning. Keep an extra on hand so you'll never be without a clean Samshield, ready to go. Machine wash, air dry.