Product Description
Adjustable Shape, Season-Busting Warmth
Sleep your way with the Boost 650™ 0 °C Down Sleeping Bag. Its patent-pending WarmZip™ center zipper lets you toggle between a roomy semi-rectangular bag and a thermally efficient mummy shape, adding up to 6 °C of warmth on demand. Plush 650-fill RDS-certified hydrophobic down is zoned where you need it most, while arm holes, a cinchable hood, draft tube and collar, and YKK anti-snag zippers deliver comfort and livability from car camp to alpine basecamp. Made with 100 % recycled nylon shell and liner treated with PFAS-free DWR, it packs light, sleeps big, and performs in three seasons.
Therm-a-Rest Boost 650™ 0 °C Sleeping Bag Features
- WarmZip™ Tech: Center zipper converts semi-rectangular bag into a cozy mummy shape, boosting warmth by up to 6 °C.
- Zoned 650-Fill Down: RDS-certified hydrophobic down placed around core, shoulders and footbox for optimized warmth-to-weight.
- Multi-Use Arm Holes: Access the WarmZip, ventilate, or use your bag as a camp cocoon without unzipping side panels.
- Comfort Enhancements: Cinchable hood, draft tube, puffed draft collar and two-way YKK anti-snag zipper for snug, adjustable fit.
- Eco-Friendly Materials: Shell and lining are 20D GRS-certified 100 % recycled nylon with PFAS-free DWR.
- Inclusive Sizing: Available in Small, Small Wide, Regular, Regular Wide, Long and Long Wide to fit every sleeper.
- Pack & Storage: Includes compression sack and roomy storage sack for long-term care.
Therm-a-Rest Boost 650™ 0 °C Sleeping Bag Specifications (Metric)
- Weight:
- Small – 0.804 kg
- Small Wide – 0.950 kg
- Regular – 0.952 kg
- Regular Wide – 1.121 kg
- Long – 1.099 kg
- Long Wide – 1.317 kg
- Temperature Rating (EN): Comfort 5 °C; Limit 0 °C; Extreme –15 °C
- Fits User Height:
- Small / Small Wide – up to 168 cm
- Regular / Regular Wide – up to 183 cm
- Long / Long Wide – up to 198 cm
- Inflated Length:
- Small / Small Wide – 188 cm
- Regular / Regular Wide – 203 cm
- Long / Long Wide – 216 cm
- Girth Shoulder × Hip × Foot (cm):
- Small – 160 × 150 × 155
- Small Wide – 191 × 185 × 155
- Regular – 163 × 152 × 155
- Regular Wide – 193 × 188 × 155
- Long – 165 × 155 × 155
- Long Wide – 196 × 191 × 155
- Packed Size:
- Small – 20 × 17 cm
- Small Wide / Regular – 25 × 17 cm
- Regular Wide / Long – 28 × 17 cm
- Long Wide – 30 × 19 cm
- Fill Weight:
- Small – 353 g
- Small Wide – 466 g
- Regular – 401 g
- Regular Wide – 537 g
- Long – 451 g
- Long Wide – 606 g
- Fill Material: 650-fill duck PFAS-free hydrophobic down (RDS certified)
- Shell Fabric: 20D 100 % recycled nylon ripstop
- Lining Fabric: 20D 100 % recycled nylon ripstop
- Zipper: Side-entry, left-hand
- Color: Meadow Green
- Country of Origin: Vietnam
Expert Review
Our experts are currently reviewing this product & will be providing their review shortly.
