Ultralight. Warm. Packable.The Widesea Ultralight Waterproof Duck Down Sleeping Bag delivers warmth and comfort in a package that compresses small enough to forget it’s in your pack. Filled with high-quality duck down in 300g or 400g options, it provides a comfortable temperature range of 5–15°C for spring, summer, and autumn camping. The included portable compression sack packs it down to a fraction of its expanded size for travel and backpacking.Key Features High-Quality Duck Down Fill – Excellent warmth-to-weight ratio for ultralight performance Waterproof Construction – Protects the down fill from moisture and condensation 5–15°C Comfort Range – I for spring, summer, and autumn camping Portable Compression Sack – Packs down small for backpacking and travel 300g or 400g Fill Options – Choose your warmth level Lightweight Design – Minimal weight for maximum packability 2 Color Options per Fill – Green (G) and Blue (B) variants Specifications Specification Details Brand Widesea Fill Material Duck Down Waterproof Yes Comfort Temperature 5–15°C Seasons 3-Season (Spring / Summer / Autumn) Compression Sack Included Fill & Color Options Model Fill Weight Color Price WDS-300G 300g Green $130.25 WDS-300B 300g Blue $127.70 WDS-400G 400g Green $149.74 WDS-400B 400g Blue $150.91 Why Choose This Sleeping Bag?Duck down provides a superior warmth-to-weight ratio d to synthetic fills — it compresses smaller, weighs less, and lasts longer with proper care. The waterproof outer shell protects the down from moisture that would otherwise collapse the loft and eliminate its insulating properties. The 300g 400g choice lets you optimize for weight (300g for warmer conditions) or warmth (400g for cooler nights).I For Backpacking and ultralight camping Travel and international adventures 3-season camping in spring, summer, and autumn Hiking and trekking base camps Festival and event camping In the Box 1 × Widesea Duck Down Sleeping Bag (fill weight and color of choice) 1 × Portable Compression Sack