Orca Men's Apparel Size Chart The light and breathable Core Tri Jersey is perfect for those looking for a Jersey that is tri functional but not super snug in fit. Constructed of an Eyelet Mesh body with a super breathable Tri-Mesh back panel to give you moisture wicking where you need it most and a longer body coverage to make sure there is nothing exposed on the bike. A centrally located back pocket ensures you can store nutrition without too much bounce, while reflective piping ensures visibility. Features: - Main: eyelet mesh -128gsm 100% polyester pk eyelet mesh - Back panel: vapour -154gsm 86% polyester (71% talent yarn) 14% spandex jacquard - Eyelet mesh and ultra-breathable fabric - Essential needs covered at a fantastic price - Reflective piping in back panel for extra visibility