The Next Level in Athletic Performance. This first-of-its-kind compression jersey will forever change the way you gear up to ride. Designed to give athletes unmatched energy saving support with cooler body temperatures. This compression jersey is part of a two-piece jersey unit meant to be worn under the Zero Over-Jersey (sold separately) that will give you unmatched performance while racing the best in the world. Athletic compression fit holds muscles tight to reduce unnecessary muscle movement or shaking that results in loss of energy. Muscle compression also promotes blood and oxygen flow which aids in quicker muscle recovery allowing for muscles to work at a higher rate for longer periods of time. Ultra-lightweight moisture-wicking performance material construction pulls moisture away from the body to keep you cool and dry. Garment cut for resistance-free mobility. Youth model.