Therm-a-Rest Boost Sleeping Bag

The center zipper allows you to adjust the bag's shape from a spacious semi-rectangular fit to a snug, thermally efficient mummy profile. By pulling the insulation closer to your body, you can effectively trap more heat on colder nights or open it up for more room when temperatures are milder.

Yes, the bag features integrated arm holes that allow you to sit up, read, or ventilate without having to unzip the bag and lose your trapped body heat. It is a practical feature for those who like to stay cozy while performing tasks inside their tent.

The 650-fill hydrophobic down is treated to resist moisture, meaning it retains its loft and warmth much better than untreated down if it gets damp. While it is not waterproof, it provides a crucial safety buffer against condensation or humid backcountry conditions.

With a temperature rating of 32°F, this bag is designed for typical spring, summer, and fall camping. If you are a cold sleeper, you may want to pair it with a high-R-value sleeping pad to ensure comfort as temperatures approach that freezing limit.

The bag is designed to accommodate users up to 72 inches, or 6 feet tall. If you are right at the 6-foot mark, you may find the fit snug, so consider your preferred sleeping position when deciding if this length is right for you.

The bag is engineered with a specific anti-snag zipper track designed to prevent the fabric from catching in the slider. While no zipper is entirely immune to snags if pulled aggressively, this design significantly reduces the frustration of getting stuck during a midnight exit.