Warmth Rating Earned: Level 4 - Extreme Warmth Engineered For Extreme Warmth in the Coldest Conditions On Earth. See Technology section below for more details. Men's insulated biberall that keeps you warm and moving comfortably in extreme cold. Carhartt Yukon Extremes gear is engineered for ultimate performance in the coldest conditions. You can consider this biberall your full-body force-field, built to protect you from freezing weather, light rain, and whipping winds. Features 6.5-ounce, 500-denier Cordura® nylon shell 150g, 100% polyester 3M™ Thinsulate™ insulation for warmth without the weight 3M™ Scotchlite™ Carbon Black reflective taping on center back and double front Wind Fighter® technology tames the wind Rain Defender® durable water repellent (DWR) keeps you dry and moving in light rain Adjustable elastic suspenders for a personalized fit; Low profile buckle closure; Two-way zip front Double-layer knees with openings for adding knee pads and cleaning out debris; Ankle-to-thigh leg zippers with storm flaps and snap closures Bar tacks at vital stress points 3M™ reflective Carhartt patch on secure chest pocket Ledge hand pockets; Front cargo pockets with hook-and-loop closure Back pockets with hook-and-loop closure; Multiple utility pockets; Right-leg hammer loop