Brand new Lems Boulder Boots choose your correct size- we do not offer exchanges This sticky rubber outsole incorporates 4mm deep lugs for incredible traction on snow, mud, and everywhere in-between! The built in zig-zag grooves (siping) provide additional biting edges to cut into ice/snow and helps ground your feet in slippery situations. Waterproofing: Yes Tongue: Gusseted Fit: Lems WIDEST Natural-Shape™ Upper: Full-grain oiled leather / Nylon Lining: Polyester with waterproof membrane Outsole: Rugged rubber outsole with 4mm lugs Insole: Adventure Poly Insole Stack Height: 16.0mm Drop: Zero-Drop Weight: 14.8 oz (Women's 11.5) Vegan: No Care & Treatment: Nikwax Waterproofing Spray