Using carbon fiber reinforcements in the shell of the TLD D4 Carbon helmet has helped pare down the weight of the full-face helmet by almost 50 grams without sacrificing strength. Despite the loss in weight, we were able to strategically add EPS to increase strength and durability. This helmet is designed and intended exclusively for use by bicycling activities, including mountain biking and off-road cycling. Specifications: MIPS brain protection system, reduces rotational forces to the brain in some crash scenarios Three shell sizes to more accurately fit a variety of head sizes and rider ages, improving overall safety Removable snap-in, washable comfort liner with Coolmax® and Dri-lex® moisture-wicking materials Super light titanium D-rings save weight and have increased material tensile strength CE EN1078*, ASTM F1952-DH, ASTM 2032-BMX. *Varies by regional standards