The Ultralight Waterproof Cotton Sleeping Bag is the dependable winter companion that adapts to your conditions. Available in three fill weights — 1.5 kg (comfort ~7°C), 1.8 kg (comfort ~5°C), and 2.3 kg (comfort ~0°C) — you choose exactly the insulation level your adventure demands. The 190T anti-tear polyester shell is waterproof and durable, while the hollow cotton fill provides reliable warmth that holds up across seasons. The envelope design with a splicing double zipper lets you connect a left-zip and right-zip bag for a spacious double sleeping bag — i for couples. A built-in compression bag with two tightening straps reduces packed volume by half, making it easy to carry in or on your backpack. Bottom zipper ventilation lets you regulate temperature when conditions warm up. Specifications Specification Detail Model SL010 Style Envelope / Splicing Double Filling Hollow Cotton Shell Fabric 190T Anti-Tear Polyester (Waterproof) Lining 190T Polyester Pongee Season Winter Standard Size 220 × 75 cm (1.8 kg) – comfort ~5°C Widen Size 230 × 90 cm (1.5 kg) – comfort ~7°C Large Size 230 × 85 cm (2.3 kg) – comfort ~0°C Splicing Yes – pair L + R zipper for double bag Bottom Zipper Yes – foot ventilation Applicable Users Adults (up to 1.8 m) Available Colors Blue, Dark Blue, Light Brown Why Choose This Waterproof Cotton Bag? Three Fill Weights: 1.5 kg, 1.8 kg, and 2.3 kg — match your insulation to your conditions rather than over- or under-packing warmth. Waterproof 190T Shell: Anti-tear polyester keeps the cotton fill dry from ground moisture and light rain — critical for maintaining insulation performance. Splicing Double Design: Pair a left-zip and right-zip bag for a spacious double sleeping bag — i for couples camping together. Compression Bag Included: Two-strap compression bag reduces packed volume by half — fits in or on your backpack without taking over your kit. Bottom Zipper Ventilation: Open the foot zipper to regulate temperature when conditions warm up — no need to fully unzip on mild nights. I For Winter camping and cold-weather outdoor adventures Backpacking and hiking in sub-zero conditions Couples camping (pairing L + R zipper bags) Campers who want adjustable insulation across three fill weights Adults up to 1.8 m needing a reliable winter bag In the Box 1 × Waterproof Cotton Sleeping Bag (size & fill weight as selected) 1 × Compression carry bag (2-strap)