The Ultralight Waterproof 4-Season Envelope Sleeping Bag is the versatile, all-conditions companion that adapts to your adventure. Available in four fill weights β 1 kg, 1.35 kg, 1.5 kg (Widen), and 1.8 kg β it covers the full temperature range from warm summer nights to cold winter camping. The waterproof shell protects the fill from moisture and ground damp, while the hollow cotton fill provides consistent, breathable insulation across seasons.
The splicing L + R zipper lets you connect two bags for a spacious double sleeping bag β ideal for couples. A built-in compression bag reduces packed volume by half. The bottom zipper ventilation lets you regulate temperature when conditions warm up. Note: the Widen option (1.5 kg) is only available in the wider 230 Γ 90 cm cut.
Specifications
| Specification |
Detail |
| Style |
Envelope / Splicing Double |
| Filling |
Hollow Cotton |
| Shell Fabric |
190T Anti-Tear Polyester (Waterproof) |
| Season |
4-Season |
| Fill Weight Options |
1 kg / 1.35 kg / 1.5 kg (Widen) / 1.8 kg |
| Standard Size |
220 Γ 75 cm |
| Widen Size |
230 Γ 90 cm (1.5 kg only) |
| Splicing |
Yes β pair L + R zipper for double bag |
| Bottom Zipper |
Yes β foot ventilation |
| Applicable Users |
Adults |
Why Choose This 4-Season Bag?
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Four Fill Weights: 1 kg through 1.8 kg β match your insulation to your conditions across all four seasons.
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Waterproof Shell: Keeps the cotton fill dry from ground moisture and light rain β critical for maintaining insulation performance.
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Splicing Double Design: Pair a left-zip and right-zip bag for a spacious double sleeping bag β ideal for couples camping together.
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Compression Bag Included: Reduces packed volume by half β fits in or on your backpack without taking over your kit.
-
Bottom Zipper Ventilation: Regulate temperature without fully unzipping on mild nights.
Important Zipper Note
To create a double sleeping bag, purchase one Left (L) and one Right (R) zipper bag. L = zipper on your left side when lying down. R = zipper on your right side when lying down.
Ideal For
- Year-round camping across all four seasons
- Backpacking and multi-day hiking
- Couples camping (pairing L + R zipper bags)
- Campers who want one bag for all conditions
- Travel and outdoor adventures
In the Box
- 1 Γ Waterproof Envelope Sleeping Bag (fill weight & zipper side as selected)
- 1 Γ Compression carry bag (2-strap)
