The Evolution Bib Liner is a versatile piece designed to work on its own or underneath your favorite pair of Fox outer shorts. The multi-panel poly/spandex tech body offers endless stretch and rebound for an ergonomic and comfortable fit. The proven Fox EVO chamois provides dual density comfort and a four-way stretch that moves with your body to eliminate hot spots and chafing. Last but not least the compression band leg grippers keep it all in place securely and comfortably. 260 GMS stretch brushed tricot UPF 50+ & wicking properties Stretch mesh upper with comfort binding Dual foam density EVO Men’s chamois Multi panel design provides ergonomic fit and performance Zippered cuffs for ease of entry Flatlock low profile seams.