*These snow boots run small. Please order one full size larger than your normal shoe size* Single M4-Series BOA dial for quick and easy in and out and customized fit. 600g thermal insulation comfort rated down to -40F Hydroguard breathable waterproof membrane. Genuine leather upper for extra longevity and wear protection Durable rubber sole to minimize wear against running boards. Reinforced toe and heel for high impact Double stitched for extra durability. Reflective side and back panels for maximum visibility Slip resistant rubber sole for exceptional traction. Over sized padded boot laces for each tightening