Outdoor Research Women's Tundra Slip-on Aerogel Booties

NASA-approved insulation, adventurer-ready slip-on bootie design. Throwing a pair of the low-ankle Tundra Slip-on Aerogel Booties into your pack turns any snow camping, mountaineering, or backcountry hut trips into a luxurious experience without the extra weight. Each bootie features a compression-resistant PrimaLoftA(R) Aerogel insert that acts as a thermal barrier between your feet and the elements, as well as a weather resistant exterior shell and grippy print on the sole. VerticalX(TM) ECO insulation offers a superior warmth-to-weight ratio that works even when wet. A collapsible heel can be worn up, or tucked away to convert booties into slippers. ABRIC : 100% polyester shell, VerticalX(TM) 100% polyester (85% recycled) insulation 200 g/m^2, PrimaLoftA(R) Aerogel 1.5mm insert, 60% polyurethane, 40% polyester soles, 100% tricot lining WEIGHT : 6.1 oz/173 g Features DESIGN FEATURES Step Down HeelAnti-Slip Sole ORIGIN Bangladesh Outdoor Research Slipper Bootie Size Chart How to measure Please refer to your shoe size. XS S M L XL MEN 7-8 8.5-9.5 10-11 11.5-12.5 13-14 WOMEN 5-6 6.5-7.5 8-9 9.5-10.5 11-12