TETON Altos 20 Degree Sleeping Bag for Adults – Lightweight Mummy Bag for Camping, Hiking, Backpacking

Meet the TETON Altos 20 Degree Sleeping Bag for Adults—a balanced blend of warmth, mobility, and practicality designed for outdoor nights that have you reaching for another starry dawn. The Altos borrows the efficient profile of a mummy bag while expanding the shoulder and knee area, so you can roll, twist, and stretch with less resistance. It’s a thoughtful choice for campers who value a contoured fit without sacrificing freedom of movement.

What makes this bag stand out is how it handles real-world conditions. The loft is lofty yet lightweight, delivering a soft, cushioned feel when you settle in. The shell is built to resist dampness, and the down insulation is designed to compress into a compact pack without losing loft when you unfurl at camp. In moderate temperatures, you’ll notice how the bag breathes enough to stay comfortable as temps dip or rise with the night air.

Comfort that adapts to your sleep style

The Altos sleeping bag is roomier at the shoulders and legs than a typical mummy bag, and it includes a built-out footbox to accommodate feet naturally. The lining feels gentle against the skin, while the overall construction promotes airflow to help you avoid overheating.

• Roomier shoulder area and a thoughtfully built footbox for added comfort
• Breathable construction pairs with warm loft to help you stay comfortable

Warmth with lightweight practicality

Loft and insulation work together to deliver reliable warmth without a heavy footprint. The down is designed to compress for travel and then rebound for loft on the ground, giving you a durable solution that travels well. The water-resistant outer shell adds a layer of resilience for damp environments or misty mornings.

• Lofty, responsive warmth with a compact profile
• Water-resistant down and shell boost comfort in moist environments

Versatility for a wide range of adventures

Whether you’re starting in your backyard or heading into backcountry terrain, Altos is built to be a dependable companion. It ships with a sturdy compression sack for easy packing, and its design supports quick setup and confident packing away for your next stop.

• From casual nights at home to remote campsites with easy packing
• Compatible with standard tents and sleeping setups

Care, support, and peace of mind

Follow care guidance to preserve loft and warmth over time, and reach out to TETON Sports’ product support if you have questions. The Altos is designed to travel with you, then rest in your gear closet until your next adventure.