Marmot Hydrogen Sleeping Bag

This bag is rated for 30°F. It is best suited for three-season backpacking trips where temperatures hover around or slightly above freezing, though your personal warmth preference and sleeping pad insulation will play a significant role.

The Hydrogen weighs 1.46 lbs. Its ultralight construction makes it an excellent choice for long-distance hikers looking to shed pack weight without compromising on warmth.

Yes, the bag is designed to accommodate users up to 72 inches, or 6 feet, in height. If you are right at that limit, you may find the fit snug, which actually helps with heat retention.

Yes, it features a PFC-free DWR (durable water repellent) treatment on the shell to help shed moisture. While it is not waterproof, this coating provides necessary protection against condensation or light mist in the backcountry.

It uses 800-fill goose down. This high-loft insulation provides an exceptional warmth-to-weight ratio, allowing the bag to compress down to a small size while maintaining its ability to loft up and trap heat effectively.

The mummy silhouette is designed to minimize dead air space, which is critical for keeping you warm. While it is more tapered than a rectangular bag, it is engineered to balance thermal efficiency with enough room to move comfortably while you sleep.