Zpacks Classic 20 Quilt Sleeping Bag Review

Zpack’s Classic Quilt Sleeping Bag is an ultralight, hoodless sleeping bag with a 3/4-length zipper that weighs between 17 oz and 21.6 oz in the 20-degree model, depending on size. The zipper lets you open it like a quilt or blanket in warm weather when less insulation is needed. Hoodless sleeping bags, especially ones this lightweight are a great alternative for backpackers and campers who don’t like the confines of a mummy hood. They can also eliminate the risk of cold drafts because they can be zipped up completely, which can be a problem with quilts, particularly in colder temperatures.

Specs at a Glance

• Temperature rating: We tested a 20-degree bag. Also available in 10-degree and 30-degree models
• Insulation: 950 fill power goose down, Downtek water-repellent treated, RDS-certified
• Size Tested: Standard width, Medium length
• Weight: 19.6 oz in a 20 degree, in a standard-width (60″), medium-length (72″) size
• Fill Weight: 13.7 oz
• Girth: 60″/60″/40″ (Shoulders/hip/feet)
• Packed volume: 6 liters
• Zipper: 3/4 length
• Shell and liner: 7d Ventum Ripstop Nylon w/ DWR
• For complete specs and sizing options, visit the Zpacks Classic product page

What’s better, a quilt or a sleeping bag for sleeping in 20-degree weather? That’s really a matter of personal preference. Some people prefer a hooded mummy bag when it gets colder, while others like a quilt. Personally, I like to split the difference and use a hoodless sleeping bag, augmented with an insulated hat or down hoodie, because I’m a side sleeper and roll around at night. A mummy bag is too confining for my head and upper body, while a quilt is too drafty when temperatures drop to 20 degrees or less.

The Zpacks Classic is a sophisticated sleeping bag that’s been optimized to save weight. I knew it would be lightweight because I’ve been using Zpacks’ gear for 10 years, but I wasn’t expecting such a nuanced and refined design.

Here are a few highlights of note:

• The bag is insulated with 950 fill power goose down which is very top-shelf and overstuffed by 30% to ensure warmth for people who sleep cold.
• The baffle construction is NOT sewn-through but boxed, eliminating cold spots along the seams. This becomes more important on bags and quilts rated for 30 degrees or colder.
• The vertical baffles on top of the bag prevent goose down from dropping down the sides, keeping the down where you want it, which is on top for maximum warmth.
• The zipper does NOT have a draft tube to seal out cold drafts because it’s assumed you’ll be lying on top of it when you use it. Most of the time, you use it as a quilt.
• The top of the zipper is reinforced with a buckle to keep it closed at night and to release stress on the zipper assembly.
• The Classic is made with a thin windproof 7 denier shell and liner to keep it lightweight.
• While tapered, the footbox is large enough so you can position your feet in any position.
• The Classic is available in several widths and lengths to accommodate individual differences. You don’t get this degree of choice with most mass-market bought sleeping bags.

The nice thing about the Zpacks Classic is that it can be completely zipped up like a sleeping bag in cool weather or unzipped and used as a quilt/blanket when it’s warmer. The zipper is on the bottom since the assumption is that you’ll use the Classic mainly as a quilt and only zip it fully very occasionally.

The Classic has a drawstring to cinch the bag closed around your neck and seal in the heat. The drawstring is positioned in the center of the bag over your chest, but it can’t be reached easily unless you lie on your back. Hoodless bags and quilts with side collar controls are much easier to use for side sleepers for this reason.

Comparable Ultralight Sleeping Bags

Recommendation

The Zpacks Classic Quilt Sleeping Bag is a great option if you’re a back sleeper and prefer a hoodless zippered sleeping bag in cooler weather, as it’s less prone to cold drafts than a quilt. The Classic is well-designed, made with high-grade materials, and available in a wide range of widths and lengths for every body type.

Disclosure: Zpacks donated a sleeping bag for review.

Updated 2026.