Outdoor Research Tundra Aerogel Slip-on Insulated Bootie Footwear Size:S The D4 Descender features a

The D4 Descender features a unique and innovative progressive cam action

enforced with Hydrostop™

or even as a handy accessory to keep in the car

you need a do-it-all system which can respond to your output and changing conditions

or for use on via ferratas

Outdoor Research Tundra Aerogel Slip-on Insulated Bootie Footwear Size:S The D4 Descender features aNASA 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 PrimaLoft Aerogel insert that acts as a thermal barrier between your feet and the elements, as well as a weather resistant exterior shell and