Early spring steelhead drifts, cool morning launches for bass, and long days trolling for salmon call for a base layer that keeps anglers comfortable without adding bulk, and the Grundens Grundies Lightweight Crew Bottom delivers lightweight performance from the first cast to the ride back to the dock. Moisture wicking fabric helps manage sweat during active fishing, while HeiQ anti odor properties keep the base layer fresh through consecutive days on the water. UPF 30 sun protection adds coverage during long hours in open boats, and the Grundens Jacquard brushed waistband improves comfort under bibs and rain gear. Self-fabric hems create a smooth fit inside boots and outer layers, while flatlock seams help prevent chafing during constant movement around the boat, shoreline, or riverbank. Lightweight performance base layer supports all-day comfort in changing conditions HeiQ anti odor treatment and moisture wicking fabric help manage sweat and odor UPF 30 sun protection adds coverage during extended time on the water Jacquard brushed waistband, self-fabric hems, and flatlock seams improve comfort and fit Imported Size Waist (in.) S 30 - 31 M 32 - 34 L 36 - 38 XL 40 - 42 2XL 44 - 46 3XL 48 - 50