Just like adults, today’s youth deserve a proper riding jersey for all of their biking disciplines. Kids and tweeners need a highly technical short sleeve jersey that is lightweight, durable, breathable and stylish. The ZOIC Youth Lucas Bike Jersey encompasses all of these great attributes and then some to provide a jersey that can take on any adventure that kids can dream of. Constructed of 100% Polyester, the Luca provides exceptional breathability and wicking properties to keep kids cool and comfortable even on the hottest of riding days. UPF + 50 also keeps the sun burn factor low during those dog days of summer when the sun's rays are at their peak. With a great fit, the Loca gives the rider excellent freedom of movement and mobility on the bike, letting the rider assume the most aggressive riding positions and not be held back by a short that binds up. Set-in sleeves and crew neck features mirror many of ZOICS adult line up of jerseys, making the ZOIC Youth Lucas Bike Jersey a formable player for little slayers. And we all know that sizing your youth can be challenging. Since there is no true sizing standard for youth, ZOIC has created a great solution for your growing Grom- Letter sizing (S/M/L) for Kids & Youth. They produce K-S/K-M/K-L and Y-S/Y-M/Y-L, for a total of 6 sizes. Each size refers to a range of measurements on their size chart. Refer to the waist, chest, and inseam measurements of their size chart to find the right size that will fit your child.