Thermarest Boost 650 0ºC Regular

The Boost sleeping bags, part of the “Backpacking Comfort” product series, are designed to be wider than usual, especially in the foot area, but they can be adjusted narrower using a zipper if needed. For many campers, the narrowest bags feel downright claustrophobic, but the Boost offers restless sleepers extra room to stretch their limbs.

The insulation down is primarily placed on the outer side of the bag, which becomes the front when lying on your back. Side sleepers should also position the back of the bag against their sleeping pad.

Short zippers on the sides allow you to slip your hands out without losing the warmth of the bag.

• Regular model: fits users up to 183 cm
• Amount of down: 401 grams, fillpower 650
• Outer fabric is made of 20-denier polyamide, crafted from GRS-certified recycled fibers
• Detachable Synergylink connectors help keep the sleeping bag properly positioned on the sleeping pad
• RDS-certified down fill is treated with Nikwax water-repellent finish, absorbing 90% less water than untreated down and retaining its loft 60 times longer
• EraLoft synthetic insulation is used in areas prone to compression
• ToeAsis foot box has an extra insulation layer to keep feet warm
• Box-shaped down compartments prevent heat loss
• YKK zipper designed to resist fabric snagging
• WarmZip zipper system positioned in the center for easy access

The bag comes with a travel stuff sack for trips and a large storage bag for home use. The latter helps maintain the loft of the insulation for years.

The fabrics are treated with water-repellent finishes free from PFC compounds.