It's no secret that layering helps keep us warm, but it's easy to end up feeling a little overstuffed with bulky layers in an effort to stay warm. Our men's Midstream Insulated Pant features PrimaLoftA(R) Silver Insulation for high-loft insulation without undue bulk or weight. It's cut for a pant-like fit, but still layers easily under waders for cold-weather warmth. The reinforced seat and knees handle general outdoors wear and tear, and a zip fly and hand-warming pockets maintain all-around utility.PrimaLoftA(R) Silver Insulation for lightweight warmthLightweight & wind-resistant PertexA(R) fabricSnap & zipper waist with drawcord2 zippered hand-warming pocketsArticulated knees & seat with woven fabric durabilityFABRIC TECH: Face: PertexA(R) Microlight 30D 100% nylon ripstop; Insulation: PrimaLoftA(R) Silver Insulation 80g; Liner: 30D 100% polyester; Reinforcement: 94% polyester/6% spandexITEM #: PG-12289TechnologiesPrimaloftA(R) Silver maintains 85% of its warmth when wet and delivers maximum insulation on the coldest days.