THE BASIC SILHOUETTE of sleeping bags hasn't changed in decades. It's still basically a slim, zippered fabric "tube" that's exactly as wide as it needs to be, leaving you little room to toss and turn. Most of them prioritize packability over comfort with only two options—zipped or unzipped—with no way to adapt to the temperature. Marmot is looking to change that with the Wraptor 30 , a clever new-this-year sleeping bag that replaces old-school zippers with magnetic flap closures that are more versatile than just about everything before it. After months of testing, here's what I found.

Pros

Versatile design effortlessly adapts to changing weather/seasons

Great for all sleepers (back, side, and stomach)

All-synthetic insulation maintains its warmth even when wet

Easy-access foot vent adds even more flexibility

100% recycled lining and shell

Cons

A little bulkier than traditional 30-degree sleeping bags

Flap system isn't as air-tight as zippered designs

Temperature Ratings 30℉ (comfort) / 26℉ (lower…