The Sea to Summit Ascent water-resistant-treated 750-down sleeping bag features zippers on both sides (a half-length zip on one side and a full length one on the other side), letting it morph from a mummy bag on cold nights to an airy, well-ventilated quilt in warmer temps. This bag is roomy and shaped for comfort with a wide hood and oversized draft collar and still keeps the weight down.
An internal pocket for your phone or valuables, a quality compression bag, and a mesh storage bag are valuable additions. The bag also zips to several other Sea to Summit bags to create the potential for a two-person snuggle fest.
MSRP: $369. Seatosummitusa.com