The Baseframe Pro Sleeveless baselayer provides moisture management, cooling, and protection in a single low-profile unit. Designed to be worn under your jersey, it provides EN1621-1 Level 1 back protection. Hip pads provide additional protection. FEATURES Impact absorbing F3 provides full coverage & unrestricted range of motion Large perforation & flex grooves in the back foam contours & flexes with rider movement Body heat activates (softens) the polymers to conform to body Moisture wicking, open stretch mesh for breathability Built in padding at hips offers additional protection F3 back insert is removeable for easy washing CERTIFICATIONS EN1621-1 level 1 back including high & low temperature conditions