Mountain Hardwear Phantom Windstopper Sleeping Bag: -40F Down Alpine Red, REGxLH

The Phantom Windstopper -40 down sleeping bag shapes its mummy cut with extra room through the footbox, so climbers can stash boots and water bottles inside without losing warmth.

Its GORE-TEX Windstopper shell blocks wind and sheds light precipitation, holding up in brutal alpine conditions.

Updated 800-fill RDS down and a lighter 15D nylon ripstop lining keep the bag warm and packable at expedition weights.

What Our Gearhead(R) Experts Are Saying:"I've spent five nights zipped into this bag above 17,000 feet and never woken up to a damp lining.

The Windstopper membrane blocks wind without turning into a vapor barrier, so the moisture I put off overnight gets out instead of collecting on the inside of the shell.".