Ultra-light race fit Jersey 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!