Kamperbox Cozy 300 Ultralight White Duck Down Sleeping Bag

Engineered for minimalist backpackers, through-hikers, and multi-season mountaineers, the Kamperbox Cozy 300 delivers premium insulation with an incredibly lightweight trail weight. Weighing just 1000 grams, this technical sleeping bag pairs an ultra-dense ripstop nylon shell with high-loft down insulation to maximize warmth-to-weight performance. Designed with a contoured silhouette to accelerate thermal efficiency, it is an ideal choice for fast-and-light wilderness expeditions where packing space and dependability are paramount.

Key Performance Features

• High-Loft 80/20 White Duck Down Insulation Packed with 400 grams of premium 80/20 white duck down, this technical fill provides exceptional natural insulation. The ultra-fine down clusters trap micro-pockets of air to retain radiant body heat, delivering elite warmth while compressing down to a fraction of its size for optimized pack organization.

• Premium 380T High-Density Nylon Shell: The exterior canopy is crafted from elite 380T down-proof nylon fabric with a technical ripstop weave. This ultra-dense textile acts as an efficient barrier against brisk wind penetration, repels exterior condensation, and prevents down migration, ensuring long-term durability on rugged terrain.

• Comfort-Focused Polyester Pongee Lining: The interior is lined with premium 300T polyester pongee fabric. This specialized down-proof technical material is chosen for its smooth skin touch, quick-drying properties, and breathability, actively wicking body moisture away to ensure a clean, dry, and comfortable sleeping climate.

• Ergonomic Heat-Trapping Architecture: Designed with an extra-long 86-inch tailored profile that minimizes dead air zone pockets to optimize thermal performance. The fully integrated 3D insulated hood features a dual-zone adjustable drawstring toggle to seal out freezing wind leaks, while the internal insulated shoulder collar keeps core warmth locked inside.

• Premium YKK Dual-Way Anti-Snag Zipper: Equipped with a professional-grade, smooth-glide YKK dual-zipper tracks. The hardware features double-sided reversible pulls for flawless ventilation tuning from inside or outside the bag, backed by a full-length insulated internal fabric draft tube to shield against cold air ingress along the zipper seam.

• Integrated Internal Gear Pocket: Features a convenient, low-profile internal storage pocket built directly into the chest liner. This keeps high-utility items like smartphones, headlamps, or GPS units protected from freezing temperatures, preserving battery life, and keeps them easily accessible overnight.

Thermal Performance Ratings

• Comfort Temperature: 5°C / 41°F (Optimal baseline temperature for a standard sleeper to rest comfortably in a relaxed, natural position)

• Comfort Limit Temperature: -4°C / 24.8°F (The threshold temperature allowing a standard sleeper to maintain a warm night's rest when curled in a protective position)

Technical Specifications

• Brand: Kamperbox

• Model: Cozy 300 (Down Technical Series)

• Assembled Dimensions (Open): 86.6 x 31.5 inches / 220 x 80 cm

• Shell Composition: Premium 380T Down-Proof Ripstop Nylon

• Lining Composition: 300T Breathable Polyester Pongee

• Insulation Fill: 400g Premium 80/20 White Duck Down

• Total Product Net Weight: 1000 grams / 2.20 lbs

• Hardware: Heavy-Duty YKK Reversible Zipper System

• Color Profile: Vibrant Alpine Green / Slate Charcoal Accent

Complete Package Includes:

• 1 x Kamperbox Cozy 300 Premium Down Sleeping Bag

• 1 x Heavy-Duty High-Compression Stuff Sack with Adjustable Tension Buckle Straps