Therm-a-Rest Boost 650 0° Regular Sleeping Bag

The Therm-a-Rest Boost 650 0 °C Regular is a down sleeping bag designed to offer greater freedom of movement without sacrificing warmth. Its semi-rectangular cut provides generous interior space, which is particularly appreciated by people who frequently change positions during the night.

Its WarmZip™ technology allows its shape to be modified according to conditions. Once the central zip is closed, the bag adopts a more body-hugging cut that reduces the volume of air to be heated and concentrates insulation around the sleeper. This configuration can provide up to 6 °C of additional warmth, according to Therm-a-Rest.

Two openings allow you to free your arms to read, handle equipment, or ventilate the bag without leaving its warmth. The two-way side zip offers additional ventilation at the torso or feet.

The hydrophobic duck down filling with 650 cuin fill power is Responsible Down Standard certified. The insulation is strategically distributed around the torso and shoulders to optimize the warmth-to-weight-to-packability ratio. The outer fabric and lining are made from fully recycled ripstop nylon, with a PFAS-free water-repellent treatment.

• Comfort temperature: 0 °C


• Filling: 650 cuin down


• Fill power: 650 cuin


• Shape: Mummy


• Specific features: Adjustable hood, side zip, stuff sack included