The helmet is made from three layers of materials. The outer layer is made from ABS material, which is known for its durability and resistance to impact. The middle layer is made from EPS material, which is designed to absorb shock and protect the head from injury. The inner lining is made from a special shock-absorbing material that provides additional protection and comfort. This helmet is perfect for anyone who wants to stay safe while enjoying their favorite outdoor activities.�Specifications�Helmet Material: ABS�Weight: 1180g� Helmet Style: Full Face Helmet�Size: 35X25X25cm�Head Circumference: 54-61cm �Feature� Unisex Fashion Helmet � ABS Engineering Material Crash Helmet� High Definition Sun Protection Double Lens � Ventilated and Not stuffy�Package Included: Helmet*1 Dust bag*1 ��Helmet maintenance:The helmet may accumulate dust and produce peculiar smell after long-term use. In this case, it should be cleaned with neutral detergent and shampoo. Do not scrub hard inside the helmet. Failure to do so may cause deformation of the cushioning material. After cleaning, wipe off the water with a towel or paper towel. Dry in a ventilated place, remember to use a hair dryer.