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The Zero SL Sleeping Bag is perfect for 2 to 3 season ultralight adventures with 1000+ fill power RDS goose down. From bike packing where every ounce counts, to multi-day walks in the tropics.
Mont Adventure Equipment says:
The Mont Zero range is the holy grail of ultralight 2/3 season sleeping bags. We have made every ounce count to give you one of the lightest, full-sized sleeping bag range on the market. The Zero SL is filled with 8.1oz. of 1000+ loft RDS goose down and weighs in at only 14.7oz. The Zero SL Down Sleeping Bag is appropriate for temperatures as low as 36°F and accommodates a user up to 6’ 8" (203cm) tall (XL).
The Zero SL Sleeping Bag is perfect for 2 to 3 season ultralight adventures. From bike packing where every ounce counts, to ultralight multi-day walks. And because of its tiny packed size and super light nature the Zero SL can be used as an extender to your existing sleeping bag, or as a just-in-case for backpacking odysseys.
Anti-Gravity Nylon is an ultralight fabric that enhances the performance and reduces the bulk and weight of down sleeping bags. The exceptionally low weight of Anti-Gravity Nylon allows down to loft to its full potential without restriction; meaning more warmth with less down, less weight, less bulk.
Our Verdict
Mont Adventure Equipment is an Australian company known for making high-performance gear for demanding alpine conditions, with a focus on low weight, precise design, and reliable materials. The Zero Superlight Down Sleeping Bag is a clear example of that design philosophy.
At 417g with 240g of 1000+ loft goose down, it's built for 2–3 season use where space and weight savings matter. The Anti-Gravity Nylon shell lofts quickly and sheds moisture well, supported by hydrophobic thread that helps keep seams dry. A contoured hood, vertical baffles, and half-length side zip all contribute to an efficient thermal seal.
It packs down to 12 × 26 cm, making it well-suited to ultralight backpacking and bikepacking. Despite its minimalism, the materials and construction feel reliable and well finished.
A dedicated ultralight bag for trips where performance and weight are equally important, it delivers confidently.
- Reviewed by Ultralight Outdoor Gear
Features
- Perfect for Bike Packing, Ultralight Bushwalking, or as an extender
- Vertical baffles on the torso maintain optimal down distribution
- Contoured hood for increased warmth
- Made with Anti-Gravity Nylon inside and out, the World's lightest downproof Nylon: 7 denier with mini rip-stop, a
- thread count in excess of 520, double heavy cire downproof treatment.
- 240g (Standard) and 260g (XL) of 1000+ loft 98/2 Premium White RDS goose down with water-resistant DWR Loft
- treatment
- 1/2 side zip using ultralight YKK #3 Zip weighs only 4grams
- Mini-baffles with sewn through construction
- Sewn with hydrophobic Epic thread to prevent moisture from wicking along seams and inside the shell
- Includes ultralight Nylon stuff sack & large storage sack
Specifications
- Regular Weight: 425g
- Long Weight: 482g
- Cold Sleepers:46°F / 8°C
- Warm Sleepers: 36°F / 2°C
- Season Rating 2-3 Season
- Packed size* 4.7x10.2 inches (12x26cm)
Material & Construction
- Shell fabric Ultralight Anti Gravity Nylon
- Lining fabric 100% recycled ultralight silk-touch 15 denier downproof Nylon
- Down rating 1000+ loft premium RDS white goose down
- Down treatment Water resistant DWR Loft treatment
- Zip side: Left
- Zip configuration Ultralight 1/2 length side zip
- Colour Shadow/Black
