Boost 650 20F/-6C Sleeping Bag

Product Information

This isn't just another sleeping bag; the Therm-a-Rest Boost 650 is designed for adaptability, letting you dial in comfort regardless of conditions. Its innovative WarmZip™ system transforms the bag from a roomy semi-rectangular shape to a thermally efficient mummy, boosting warmth by up to 10°F (6°C). Thoughtful details like zippered arm holes let you perform tasks without leaving the warmth of your bag, making it a versatile choice for 3-season backpacking and camping.

Features

• WarmZip™ technology allows conversion from spacious semi-rectangular to heat-retaining mummy shape.
• Zippered arm holes enable ventilation or activity while remaining in the bag.
• 650-fill Nikwax Hydrophobic Down is RDS-certified and PFAS-free, resisting moisture to maintain loft.
• GRS-certified 100% recycled 20-denier nylon shell and lining with PFAS-free DWR coating.
• Zoned insulation concentrates down in key warmth areas like the top, core, and shoulders.

Specs

• Temperature Rating: 20°F / -6°C.
• Fill Material: 650-fill-power duck PFAS-free hydrophobic down (RDS certified).
• Shell Fabric: GRS-certified 100% recycled 20-denier nylon ripstop.
• Lining Fabric: GRS-certified 100% recycled 20-denier nylon ripstop.
• Shape: Semi-rectangular, convertible.
• Weight (Regular): Approximately 2 lbs. 11 oz. (1.22 kg).
• Packed Dimensions: Approximately 20 x 7.5 inches (50.8 x 19 cm).