The BSWOLF SL010-1 Envelope Sleeping Bag is the reliable three-season companion that adapts to your conditions. Available in three fill weights — 1.35 kg, 1.5 kg (Widen), and 1.8 kg — it covers the full spring-to-autumn temperature range from 5°C to 15°C. The 190T anti-tear polyester shell is waterproof and durable, while the hollow cotton fill provides consistent, breathable insulation that holds up across seasons. The splicing double zipper (L + R options) lets you connect two bags for a spacious double sleeping bag — i for couples. A built-in compression bag with two tightening straps 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 × 90 cm cut. Specifications Specification Detail Brand / Model BSWOLF SL010-1 Style Envelope / Splicing Double Filling Hollow Cotton Shell Fabric 190T Anti-Tear Polyester (Waterproof) Lining 190T Polyester Pongee Season 3-Season (Spring, Summer, Autumn) Temperature Rating 5°C to 15°C Standard Size 220 × 75 cm (1.35 kg / 1.8 kg) Widen Size 230 × 90 cm (1.5 kg only) Splicing Yes – pair L + R zipper for double bag Bottom Zipper Yes – foot ventilation Applicable Users Adults Available Colors Dark Blue, Light Brown Why Choose the BSWOLF SL010-1? Three Fill Weights: 1.35 kg, 1.5 kg, and 1.8 kg — match your insulation to your conditions rather than over- or under-packing warmth. 190T Anti-Tear Waterproof Shell: Durable and water-resistant — keeps the cotton fill dry from ground moisture and light rain. 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 Spring, summer, and autumn camping trips Backpacking and multi-day hiking in mild conditions Couples camping (pairing L + R zipper bags) Campers who want adjustable insulation across three fill weights Adults needing a reliable, packable three-season bag In the Box 1 × BSWOLF Envelope Sleeping Bag (size & fill weight as selected) 1 × Compression carry bag (2-strap)