100% waterproof. Durable hand lasted rubber with a 4¨Cway stretch inner bootie. Constructed with 4mm Bogs. Neo¨CTech insulation. 2mm BogesEverDry with Max¨CWick to keep feet dry. Dual density, contuured EVA insole with DuraFresh anti odor protection. Comfort rated to sub zero conditions. REALTREE.