The Simms PG-12438 Fleece Midlayer Bib offers seamless warmth under your waders for layering on the coldest days. The grid-fleece interior traps heat next to your body for warmth without limiting your range of motion or adding bulk. A front zip allows easy access when nature calls, and stretch-woven stirrup cuffs keep the legs in place in waders and boots. Simms PG-12438 Fleece Midlayer Bib Features: Abrasion and odor-resistant fabric Grid-fleece interior Stretch-woven stirrups Front zip entry YKK corrosion-resistant zipper Thermolaminated zippered chest pocket FABRIC TECH: Body: 95% polyester / 5% spandex;Pocket: 85% nylon / 15% spandex