Sitka Back 40 Rubber Boot - Optifade Timber Combining an ultra-tough and waterproof build with lightweight, sneaker-like comfort, the Back40 Boot redefines tall boot performance. Low-bulk 800g Thinsulate™ insulation regulates temperature throughout the season’s changing weather, maintaining comfort throughout demanding hunts and long days of work. The fully waterproof rubber and neoprene construction, strength-enhancing toe and heel rubber overlays, and terrain-chewing traction make this an icon of dependable durability. Features - The waterproof rubber and neoprene upper is zonally molded to provide additional comfort and protection - Full-length, molded EVA midsole provides unmatched underfoot comfort - 800g Thinsulate™ insulation offers all-season temperature regulation - Rubber outsole bolstered by our proprietary SITKA Apex Tread System for maximum traction on any terrain - Proprietary molded PU Footbed furthers underfoot comfort