Delivering optimal mobility, warmth, and next-to-skin comfort, the Simms Heavyweight Baselayer Bottom provides your lower half with an enhanced layer of defense from bone-chilling winds and freezing temperatures. Made from a premium blend of polyester and elastane, the Simms Heavyweight Baselayer Bottom features an ultra-warm micro-grid fleece interior that traps body heat in and wicks moisture out. The Simms Heavyweight Baselayer Bottom also comes fitted with strategically placed stretch panels, which allow for seamless integration when worn with socks or paired up with bibs and boots. In addition, this heavyweight layer of insulation is treated with antimicrobial technology to help eliminate odor-causing bacteria and keep you smelling fresh. An essential piece to every angler’s layering system, the Simms Heavyweight Baselayer Bottom is a must-have when headed out to the lake in wintry conditions. -Micro-grid fleece interior-Smooth jacquard exterior-Moisture management technology-Antimicrobial technology-Strategically placed stretch panels-Flat Elastic Waistband-Fly pouch