The Give’r Frontier Mittens are all-leather exterior mittens made of premium cowhide, a superior insulation system, and a 100% waterproof membrane. It can handle extreme temperatures from freezing at -40°F to scorching hot at 400°F. Give’r has been testing and iterating mitten prototypes for 2+ years, In addition to ice fishing, whacky test cases for the mittens have included: handling burning logs, picking up dry ice, and submerging them in boiling water.