Therm-a-Rest Boost

The semirectangular shape offers more internal volume, specifically around the shoulders and hips. This provides extra room to move, making it a better choice for side sleepers or anyone who feels restricted by the tight fit of a standard mummy bag.

Yes, the center-zip system is designed for versatility. You can use it to transition between a more spacious, relaxed fit for warmer nights and a tighter, thermally efficient mummy configuration when you need to retain more body heat.

The Boost 32 uses 650-fill-power hydrophobic duck down, which is treated to resist moisture. While no down is completely waterproof, this treatment helps the insulation maintain its loft and warmth better than untreated down in damp conditions.

This bag is rated for 32 degrees Fahrenheit. It is best suited for three-season camping, providing reliable warmth for cool spring, summer, and autumn nights, but it is not intended for deep winter or sub-freezing temperatures.

Yes, it includes a draft collar that sits around your neck or shoulders to seal in warmth and prevent heat from escaping through the top of the bag.

The regular size weighs 2.125 lbs and compresses down to 5.7 liters. It is a manageable size for backpacking, balancing weight and packability with the comfort of a roomier shape.