The Summerlite, rated at 32 degrees F, is a feather-light, fully-baffled, traditional mummy bag. While most of the products in our Ultralight Sleeping Bag review forgo a hood and other features common to mummy bags, the Summerlite has them all: a full-length zipper, a draft tube that backs it, and a warm hood. While most ultralight backpacking enthusiasts prefer quilts or bags that eliminate the hood, it's not everyone. One of our testers has thru-hiked the Triple Crown of Hiking with a Summerlite, and it continues to be his go-to bag for all three-season backpacking.
Of the two ultralight hooded mummy bags we evaluated this year, our testers much prefer the Summerlite to the Mountain Hardwear MTN Speed 32. We found the Summerlite warmer, more durable, and more versatile due to the full-length zipper.