Hummingbird UL 20/30 Sleeping Bag

New for Winter 2025/2026: The Hummingbird UL gets all-new Pertex® Quantum Pro® shell fabric + Pertex® Diamond Fuse lining fabric in the footbox, plus new and familiar colors

When every gram counts and warmth can’t be compromised the Hummingbird is the versatile bag of choice. With the slimmest cut in our lineup, the Hummingbird leaves no room to spare; perfect for going fast and light. The Pertex® Quantum Pro® variation with 950+ fill power down is our lightest mummy bag ever.

Available in 20 Degree & 30 Degree options.

Hummingbird too tight for comfort?  Check out the Swallow UL for the same great features with a little more room.

UL: Ultralight. Pertex® Quantum Pro® water-resistant/breathable fabric with 950+ Fill Power Down

Best for Fast and Light Adventures
"There may be no better bag out there when ounces really count the most"

- OutdoorGearLab's Top Pick

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Details

• Mummy shape (narrow) with #5 YKK two-way, separating zipper with locking sliders
• Passive collar provides an extra cushion of down around your neck to trap the heat
• Trapezoidal footbox allows your feet to fall in a natural pose without compressing the sides
• Pertex® Diamond Fuse 15 denier footbox lining that offers more abrasion protection for more nights at camp
• Continuous baffles let you position the insulation where you need it
• 3D contoured hood opens wide for warm nights and cinches tight when the temps start to drop
• Generous draft tube prevents cold air from seeping past the zipper
• Includes storage bag & stuff sack

Specs