Product Overview
The TETON Sports ALTOS Sleeping Bag is engineered for outdoor enthusiasts who demand warmth, comfort, and portability without compromise. Designed with a focus on practical performance, this mummy-style sleeping bag offers a roomier fit than traditional options—providing more shoulder and leg space, along with a built-out footbox that gives your feet room to move naturally. Whether you’re setting up camp in a national park or enjoying a backyard stargazing session, the ALTOS delivers reliable thermal protection in a highly compressible package that fits seamlessly into any backpack.
Built for versatility, the ALTOS comes in two temperature-rated options—20°F and 0°F—so you can choose the level of insulation that best suits your climate and personal warmth preference. Its nylon shell and sustainable, water-resistant fill maintain loft and effectiveness even in damp conditions, making it a dependable choice for unpredictable weather. Thoughtful design details like a 3-piece contoured hood, draft tube zipper system, and included compression sack reflect TETON’s commitment to combining high-end features with accessible value.
From thru-hikers to weekend campers, the ALTOS strikes an ideal balance between weight, warmth, and ease of use. It’s not just a sleeping bag—it’s a tool designed to step up your adventure, no matter where it takes you.
Key Features
- Roomy Mummy Design: Offers generous shoulder and leg area compared to standard mummy bags, improving comfort for various body types and sleeping positions.
- Vaulted Footbox: Provides extra space at the foot end, allowing your toes to stay warm and flexible—especially important on cold nights when full extension enhances heat retention.
- Lofty, Water-Resistant Fill: Lightweight insulation retains warmth while resisting moisture, ensuring consistent performance in humid or damp environments.
- Highly Compressible: Packs down small using the included compression sack, saving critical space in backpacks without sacrificing loft when unpacked.
- Draft Tube Zipper System: Prevents cold air from seeping through around the zipper, enhancing overall thermal efficiency during sleep.
- 3-Piece Contoured Hood: A drawcord-adjustable hood wraps comfortably over your head, trapping warmth and keeping your neck protected from drafts.
- Sustainable Insulation: Eco-conscious fill materials reduce environmental impact while maintaining high-performance warmth.
- Included Compression Sack: Makes packing effortless—just stuff from the bottom up and secure with durable straps; never roll your bag again.
Technical Specifications
- Temperature Rating: Available in 20°F and 0°F options
- Shell Material: Nylon
- Hood Type: 3-piece contoured hood with drawcord adjustment
- Zipper Feature: Draft tube technology
- Insulation: Sustainable, water-resistant fill
- Packaging: Includes compression sack
- Care Instructions: Hand wash only
- Origin: Made in the USA or Imported
Construction Style: Mummy with vaulted footbox
Benefits & Use Cases
The ALTOS Sleeping Bag is built for adventurers who need reliable warmth without sacrificing mobility or comfort. Its roomier cut accommodates side and stomach sleepers who may find tighter mummy bags restrictive, while the vaulted footbox ensures your feet aren’t cramped—even when fully extended for maximum warmth. This makes it especially valuable during colder nights or higher-altitude trips where heat retention is critical.
Thanks to its lightweight construction and highly compressible design, the ALTOS fits easily into standard-sized backpacks, making it ideal for multi-day hikes, ultralight backpacking, or travel adventures. The water-resistant fill maintains effectiveness in unexpected rain or high humidity, giving you confidence in changing conditions. Unlike lower-quality bags that lose loft when wet, the ALTOS keeps performing where others falter.
What truly sets the ALTOS apart is its blend of premium features at an accessible price point. You get a 3-piece hood, draft tubes, sustainable materials, and a vaulted footbox—features typically reserved for higher-end models. These thoughtful touches enhance real-world usability: the hood seals out drafts, the draft tubes block cold spots, and the footbox prevents stiffness in your toes. Together, they create a sleep experience that feels tailored, not generic.
Whether you’re heading into the backcountry for a week-long trek or simply looking for a cozy night under the stars in your backyard, the TETON ALTOS provides the warmth, space, and portability needed for worry-free rest. It’s engineered to keep you comfortable, so you can focus on what matters most—your next adventure.
Important Notes
- This sleeping bag must be hand washed only. Machine washing can damage the fabric and compromise the integrity of the insulation.
- Always use a sleeping pad underneath the bag to improve insulation and protect against ground moisture.
- When packing with the compression sack, start stuffing from the bottom of the bag upward, then pull the heavy-duty straps tight to compress without overstressing the fabric.
- Store the sleeping bag loosely when not in use—do not leave compressed for extended periods—to preserve the loft and extend the lifespan of the insulation.
- Choose between the 20°F and 0°F models based on expected nighttime temperatures and your personal tolerance for warmth. A slightly warmer bag offers flexibility if conditions fluctuate.
