RiverTek™ Bottoms feature high-tech COR3 fabric powered by prime anti-odor performance, superior moisture management, in a midweight underwader pant. Slip into comfort with 4-way stretch mobility, a plush elastic waist, and hydrophobic stirrups for easy on-off layering. FEATURES New design utilizing technical fabric to provide warmth and unparalleled moisture management COR3™ fabric technology offers anti-odor performance, superior moisture management & UPF 50 sun protection 4-way stretch polyester pique fabric for ultimate mobility Flat seam construction for comfortable layering Butterfly front fly opening with 2-ply coverage Simms logo plush elastic at waist Hydrophobic stirrup provides non-binding, comfortable fit and easy-on, easy-off under waders or as a layering system UPF protection is inherent in the fabric and will not diminish due to laundering