Bogs Men's Sitka-M 100% Txtile and synthetic Imported Rubber sole Shaft measures approximately 16" from arch Heel measures approximately 1.5" Boot opening measures approximately 16" around Ultimate winter hunting boot 8mm of neo-tech lite insulation with bogs max-wick lining to manage sweat moisture, surrounded with 600 grams of thinsulate to lock heat in A waterproof 3mm neo-lite snow cuff lined with plush fleece to seal out wet and cold Scent combat bio-technology activates to fight unwanted odors Rebound technology in outsole provides extra comfort