Made with a race fit and air channels for superior ventilation, the MTB Trail 4. 0 Jersey is here to give us what we need for a spectacular ride. It promotes comfort so we're never distracted from maxing out on stoke, and we like that it includes welded seams at the cuff and hem for durability. Two side pockets make room for small items, and rear reflective details ensure we're seen riding to and from trailheads.