40-Degree Quilt

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UOG TOP PICK – For an Ultralight Summer Sleep system: With 1000-fill down, minimalist construction, and a trail-ready weight of under 500g, this quilt delivers premium comfort for warm nights without weighing you down.

Hyperlite Mountain Gear says: 

Loaded with 1000-fill power down and sewn into a durable 7d micro ripstop nylon exterior shell, the 40-Degree Quilt is warm, comfortable, incredibly light, and highly packable.

One of our two quilt offerings, the 40-Degree Quilt is the perfect ultralight backpacking quilt for milder in-season temperatures.

Our Verdict

Hyperlite Mountain Gear’s 40-Degree Quilt shares the same premium build as its colder-rated sibling, but it’s made for mild summer nights. Weighing just 471g in the regular size and filled with 251g of 1000-fill down, it offers an impressively compact sleep system without cutting corners on quality. The 7D nylon shell is whisper-thin, though it does need some care. Sewn-through baffles keep things minimal and are perfectly suited to a summer bag.

The footbox is stitched shut, which cuts draughts effectively, and the familiar clip-and-strap system attaches neatly to your mat. Setup is quick and straightforward, and the neck drawcord seals without fuss. There’s just enough room across the shoulders for a relaxed sleep without feeling restricted. One thing that’s a little disappointing is that the quilt doesn’t come with a dedicated stuff sack, which feels like an oversight.

I’d be happy using it to 4°C. It would be good for low-elevation summer trails or hut-to-hut fastpacking where you want the lightest possible pack without sacrificing a good night’s sleep.

– Reviewed by Ultralight Outdoor Gear

Features

• Includes large volume storage sack for long-term storage at home.
• 1000 Fill Power Grey Goose Down treated with a DWR finish for loft retention
• Sewn Footbox
• 3 Low-Profile center push clips, coupled with the neck drawcord help reduce drafts and lock-in warmth
• 4 sewn-in loops provide additional lashing points for securing to a sleeping pad
• Comes with 2 separate pad attachment straps that match up to the clips on the quilt. Allows for securing the quilt to a sleeping pad, further minimizing drafts for active sleepers
• 7D micro-ripstop nylon shell and lining is durable, extremely light-weight, and provides excellent air permeability for maximum compression
• Spacious / Oversize

Specifications

Regular

• Weight: 471g
• Interior Length: 72.0″ | 182.9cm
• Shoulder Width: 58.0″ | 147.3cm
• Footbox Circumference: 42.0″ | 106.7cm
• Fill Power: 1000 FP Down w/ C0 DWR
• Fill Weight: 8.9oz | 251g

Long

• Weight: 467g
• Interior Length: 80.0″ | 203.2cm
• Shoulder Width: 62.0″ | 157.5cm
• Footbox Circumference: 44.0″ | 111.8cm
• Fill Power: 1000 FP Down w/ C0 DWR
• Fill Weight: 10.1 oz. | 285g

Material & Construction

• Material – 7D Micro-Ripstop Nylon treated with a C0 DWR
• Insulation – Grey Goose Down treated with a DWR finish for loft retention

Help & advice:

• The Ultimate Guide to Lightweight Sleeping Bags
• Time-Saver Guide to Choosing a Sleeping Bag
• Why Choose a Backpacking Quilt?
• The Ultimate Guide to Ultralight Backpacking Quilts
• All About Down
• Responsible Down Standard
• Ethical Down