The Extreme Softshell Jacket from RefrigiWear takes keeping your warm to the "extreme." Comfort-rated to -60°F, the jacket features a double front zip to regulate warmth, a reflective interior to trap warm air, an adjustable waist seal to combat drafts and over 500 total grams of insulating power. Stay safe in low visibility environments with Ansi Class 3 compliant HiVis material and reflective tape. The tape features the enhanced safety feature of an X shape on the back to indicate facing direction. Sizing Instructions: For the most accurate fit, take your measurements over the base layer of clothing you intend to wear with this RefrigiWear gear (such as thermal underwear, jeans or a sweatshirt) and refer to the size chart for this product.