The S1 High-Impact Protective Jersey provides you with the best protection for track, street, or mountain performance, while the Nylon/Spandex (85%/15%) mesh fabric allows for a more breathable, drip dry fabric. Featuring more pads than its S1 Protective Jersey counterpart, the S1 High-Impact Protective Jersey not only provides you with excellent protection against falls, but also giving you the mobility and flexibility in a lightweight design. SIZES S1 High-Impact Protective Jersey Size Chart SIZE HEIGHT WEIGHT SIZE: Youth XS HEIGHT: 100 - 120 cm WEIGHT: 429 gram SIZE: Youth Small HEIGHT: 115 - 135 cm WEIGHT: 460 gram SIZE: Youth Medium HEIGHT: 130 - 150 cm WEIGHT: 502 gram SIZE: Youth Large HEIGHT: 142 - 160 cm WEIGHT: 547 gram SIZE: Youth X-Large HEIGHT: 152 - 168 cm WEIGHT: 588 gram SIZE: Adult Small HEIGHT: 160 - 170 cm WEIGHT: 662 gram SIZE: Adult Medium HEIGHT: 165 - 178 cm WEIGHT: 707 gram SIZE: Adult Large HEIGHT: 170 - 185 cm WEIGHT: 754 gram SIZE: Adult X-Large HEIGHT: 180 - 192 cm WEIGHT: 798 gram