SIZE★Fits head circumference of 20.3-24” head circumference. DOUBLE LAYER PROTECTION★The helmet body consists of an ABS outer helmet and an EPP foam inner helmet, the ventilation holes provide good breathability, and the EPP elastic foam inner helmet enhances resistance and better protects your head. LIGHTWEIGHT★The helmet weighs only 430 grams (about 1 pound). Perfect for any outdoor activity, the lightweight design means you won't get fatigued from wearing a helmet on your head while still maintaining the protection you need for intense outdoor activities. EASY TO FIT★The helmet cover is made of 500D nylon with elastic cord and velcro, the helmet cover can be loaded with many helmet accessories. It is very easy to install and remove the helmet cover. WIDE APPLICATION★Suitable for all kinds of outdoor activities - real CS, airsoft, paintball, hunting,CS use. Can also be used as a gift for family and friends of outdoor sports enthusiasts. Order Includes:1*Helmet+1*Helmet Cover