The 335 tribal full face helmets are dependable, yet affordable. They are composed with lightweight ABS thermoplastic resign giving the helmet strength and durability while adding comfort inside the helmet with its integrated polyester liner which can be removed and or replaced. The advanced channeling ventilation makes the helmet very comfortable in any riding condition as well. It is available in 3 color options and sizes range from S-XXXL. For proper fit and size measure the circumference of your head 1" above your eyebrows and around the largest portion of the back of your head. 20 7/8" - 21 1/4" = X-Small; 21 5/8" - 22" = Small; 22 3/8" - 22 3/4" = Medium; 23 1/4" - 23 5/8" = Large; 24" - 24 3/8" = X-Large; 24 3/4" - 25 1/4" = XX-Large; 25 5/8" - 26" = XXX-Large.