GRUNDIES LIGHT CREW BOTTOM

Lock in your core warmth and build the ultimate cold-weather defense system with the Grundéns Grundies™ Lightweight Base Layer Bottom. Specifically engineered for dedicated outdoorsmen who refuse to let bone-chilling weather end their day early, these high-performance long underwear bottoms act as a crucial foundation for retaining vital body heat. Crafted from a lightweight, ultra-breathable stretch blend, they provide exceptional moisture-wicking capabilities to move sweat away from your skin during high-exertion movements. Integrated HeiQ™ anti-odor properties combat scent-producing bacteria to keep you feeling fresh through multi-day trips. Designed with a custom Grundéns jacquard brushed waistband for non-slip comfort, flatlock seams to entirely prevent painful chafing, a clean self-fabric hem, and built-in UPF 30 sun protection, this modular bottom layers cleanly under heavier pants or technical wading bibs without binding or bunching. 

Rocky Mountain Late-Fall Tailwater Layering & Care Advice: Late-season wade fishing near Casper on the freezing tailwaters of the North Platte River demands smart thermal management. When stepping into deep, sub-40°F river pools, the freezing water instantly compresses standard fabrics against your skin, robbing you of body heat. The Grundies Lightweight Bottom creates a crucial micro-climate pocket of warm air beneath your stockingfoot waders. Because high-altitude hiking back out to the truck causes sweat—which leads to rapid hypothermia when you stop moving in Wyoming's cold winds—the rapid moisture-wicking and HeiQ anti-odor technology are essential for keeping you dry and scent-free. To protect the performance fibers from alkaline river mud and high-altitude UV wear, machine wash cold with a mild liquid detergent; never use fabric softeners or powder detergents, as they clog the moisture-wicking pores.