With a women��s-specific build and fit, the women��s 509 Raid Double BOA庐 Boot has been designed for women from the ground up. Warmer than the others, thanks to an increased 800 grams of Thinsulate�� insulation and a soft, high-pile micro fleece lining, these boots feature our 5TECH�� waterproof-breathable liner plus the versatility and strength of a Double BOA庐 closure system to create a boot built to keep up with any rider, all day long.