Light cool and awesome looking! The 4.0 jersey is the premium race jersey made from ultra-light stretch mesh fabric that is MoistureCool wicking and has air channels. The tailored race fit stretch material can be worn with or without body armor and of course is neck brace ready! The elbows of the jersey are reinforced with Brush Guards an ultra-thin flex film that is feather-light and increases scratch and abrasion resistance properties. Welded seams at the cuff and hem provide maximum comfort and fit. So just point the bike down the trail and stay loose! Ultra-light slim fit for superior riding comfort MoistureCool mesh fabric with air channels for amazing ventilation Stain-resistant fabric coating Dirt Water and Stain-resistant fabric coating DWR Brush Guard reinforcement on elbows Welded seams at cuff and hem for maximum comfort Collar design for use with or without a neck brace Racing stretch fit for riding with or without body armor  Two side pockets Rear reflective detail Plastic Free Packaging Light cool and awesome looking!