The Back40 Boot redefines tall boot performance from pre-season prep to late-season sits. From the top of the upper to the bottom of the outsole, this boot is engineered with all-day comfort in every facet of the design. 800 grams of Thinsulate™ insulation regulates temperature throughout the hunts and tasks you traverse. The fully waterproof construction, additional rubber overlays, and a rubber outsole with multi-surface traction create the epitome of dependable durability. 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 of Thinsulate™ insulation system offers all-season temperature regulation Multi-surface rubber outsole bolstered by our proprietary SITKA Apex Tread System for traction on any surface Proprietary molded PU Footbed furthers underfoot comfort Heel and toe rubber overlays bolster durability where you need it most Rubber heel kick pad allows for easy exit If between sizes, we recommend sizing up Comfort range -20 °F to 40 °F Size 10 boot ~ 18” height, 17.6” calf circumference 42.5 oz per boot (measured in a size 10) Sizing Boot Size Men’s Shoe Size Women’s Shoe Size 4 4 5 5 5 6 6 6 7 7 7 8 8 8 9 9 9 10 10 10 11 11 11 12 12 12 13 13 13 14 14 14 15 Collar Height Men’s Shoe Size VentLite GTX Back40 Boot 10 18″ 17.5″ Collar Circumference Men’s Shoe Size VentLite GTX (in) Back40 Boot (in) 6 16.1″ 16.1″ 7 16.5″ 16.5″ 8 17.0″ 16.9″ 9 17.6″ 17.2″ 10 18.1″ 17.6″ 11 18.6″ 17.9″ 12 19.2″ 18.3″ 13 19.7″ 18.7″ 14 20.2″ 19.1″ Foot Measurement Foot Length in Inches Men’s Boot Size Women’s Boot Size 9 7/8″ 6 7 10 1/4″ 7 8 10 1/2″ 8 9 10 7/8″ 9 10 11 1/4″ 10 11 11 1/2″ 11 12 11 7/8″ 12 13 12 1/4″ 13 14 12 1/2″ 14 15
