Aerie 0° to 45°F Down Underquilt / Sleeping Bag
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(Out of stock bags should be back in stock by May)
- Most Versatile Bag Available: With 5 different uses for the Aerie, it's always useful.
- Lightest Weight Materials: featuring our lightest weight fabrics and highest quality insulation. Just imagine the warmth when temperatures drop without packing more weight or bulk!
- Optimizing Baffle Design: the baffle design locks the insulation into place so that you never have colds spots and sleep warm and comfortable all night!
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Your Choice Of Insulation Type: Choose between our DWR coated StormLoft 800-Fill Power down, or our Hybrid LoftTek insulation and stay warm and confident in your gear whatever the circumstances!
- Small In Your Pack: not only will your back thank you for choosing premium ultralight materials, but these materials also compress smaller taking up less space in your backpack!
- Limited Lifetime Warranty protects you from any defects so that you can rest easy knowing you are receiving the highest quality gear that is ready to better your next adventure!

AERIE 0° - 45°F UNDERQUILT / SLEEPING BAG
Hammock camping continues to grow, but affording all of the gear is expensive. We created a solution for our customers to get more for their money! The new Aerie Underquilt / Sleeping Bag allows our customers to purchase a sleeping bag that they can also use for other adventures! Add in our direct to consumer pricing and camping has never been so affordable and comfortable! |
5 Uses Of The Aerie
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Technical Specs
Temperature Rating | 0 to 45 degrees Fahrenheit |
Weight |
0°F Down: 2 lb 11.5 oz |
Shell | 20 Denier Ripstop Polyester with VitalDry™ DWR Coating |
Lining | 20 Denier Ripstop Polyester |
Insulation Type | IDFL/ RDS Duck Down OR LoftTek Hybrid Insulation |
Fill |
800-Fill Power StormLoft™ Water Repellent Down (DWR) LoftTek Synthetic Fill + 800-Fill Power StormLoft Water Repellent Down (DWR) |
Fill Weight |
0°F Down - 780 g |
Zipper Location | Right |
Sleeping Bag Shape | Rectangle Underquilt |
Size | 70 X 32 in |
Shoulder Girth | 64 in |
Hip Girth | 64 In |
Compressed Size | 10 x 7 x 7 inches |
Gender | Unisex |
Warranty | Outdoor Vitals Lifetime Warranty |

- Hammock Underquilt: trying to avoid "cold butt syndrome?" The Aerie 30 has you covered, literally.
- Hammock Pod System: great for when you have a hammock, but no top quilt, sleeping bag, or other forms of insulation!
- Technical Blanket: unzip the Aerie completely and use it at any kind of event as a technical blanket!
- Sleeping Bag: yes, the Aerie 30 can even be used as a tradition rectangular shaped sleeping bag- no cramped footbox!
- Double Sleeping Bag: With another Aerie or one of our Roost quilts, you can zip 2 together and have a double sleeping bag to share with that special someone!

Live Ultralight with Outdoor Vitals
Outdoor Vitals challenges outdoor enthusiasts to “Live Ultralight” through use of premium ultralight products that cut down on waste. Living Ultralight means using premium gear that works in any weather, is easy to pack and won’t slow you down. It means buying less quantity to fill up our earth’s landfills and buying more quality products that are ready for all your adventures. Join us and start living an Ultralight life full of adventure!
Quality products come down to three simple points, quality components, quality manufacturing and quality designs. We work tirelessly to source only the finest quality fabrics and insulation, develop personal relationships with our manufacturing partners and field test every piece of gear, for a finished trail proven and ready product!
We also know that we've been fortunate while others have not so we donate 1% of revenues to sustainable poverty projects around the world.
Start Living Ultralight now so you can hike more, go further and see the world!
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- 10D fabric & 800+ IDFL certified down reduce weight and increase packability so that you can pack it effortlessly AND stay toasty warm at night!
- Innovative Shoulder Baffles comfortably seal in the heat without needing to fight restrictive cords and drawstrings so you can sleep more free and peaceful!
- Center Zip Design & Boxed Zipper Baffles allow easy, warm access in and out of the bag without losing your zipper in the night which means smoother & faster entry and exit!
- Body Mapping Cut & Hybrid Direction Baffles remove excess material and seam weight for optimal weight to warmth ratios so that you only pack what you need to stay comfortable all night long!
- Limited Lifetime Warranty protects you from any defects so that you can rest easy knowing you are receiving the highest quality gear that is ready to better your next adventure!
Get 10% Off & Free Priority Shipping By Joining The Live Ultralight Membership Here!
- LoftTek™ Hybrid Insulation is a mix of 80% LoftTek™ & 20% 800+FP down that provides bulletproof warmth and down like weight/packability even when soaking wet!
- 20D fabric & Hybrid LoftTek 650+ Fill Power Insulation reduce weight and increase packability so that you can pack it effortlessly AND stay toasty warm at night!
- Innovative Shoulder Baffles comfortably seal in the heat without needing to fight restrictive cords and drawstrings so you can sleep more free and peaceful!
- Center Zip Design & Boxed Zipper Baffles allow easy, warm access in and out of the bag without losing your zipper in the night which means smoother & faster entry and exit!
- Body Mapping Cut removes excess material for optimal weight to warmth ratios so that you only pack what you need to stay comfortable all night long!
- Limited Lifetime Warranty protects you from any defects so that you can rest easy knowing you are receiving the highest quality gear that is ready to better your next adventure!
** If what you are looking for is still unavailable, use the "Notify Me When Available" button and we'll notify you when they are back in stock. Thanks! **
Get 10% Off & Free Priority Shipping By Joining The Live Ultralight Membership Here!
STORMLOFT™ DOWN: Certified 800+ fill power down both responsibly sourced and DWR treated. Enjoy lighter packs with premium quality down that is more resistant to moisture!
- Cadillac of TopQuilts: The new StormLoft™ topquilt not only features premium treated down but features the best materials in a superior baffling design for the most warmth and least weight!
- Lightest Weight Materials: Feel as light as a feather while packing our new lightest weight fabric (10D) and highest quality down (800+FP).
- Hybrid Baffle Design: Stay warm everywhere with our hybrid baffling system that optimizes both the stability of down for warmth and minimizing seam weight for lighter packs!
- Small In Your Pack: Your back will thank you for using premium ultralight materials and so will your backpack because these materials compress smaller taking up less space in your backpack!
** If what you are looking for is still unavailable, use the "Notify Me When Available" button and we'll notify you when they are back in stock. Thanks! **
Get 10% Off & Free Priority Shipping By Joining The Live Ultralight Membership Here!
NEW INSULATION - LOFTTEK™ HYBRID: The most advanced, ultralight & packable synthetic in the world!
- FIRST OF IT’S KIND INSULATION: For years outdoor lovers have wanted the benefits of down insulation (lightweight, warm, compressible) without the downsides of down (fails when wet). Our new LoftTek Hybrid insulation utilizes cutting edge science to give you the benefits of down, without the downsides! This means you'll sleep warm and comfortably even if your gear gets wet!
- ULTRALIGHT WEIGHT: 650+ fill power LoftTek Hybrid insulation fills the bag, which gives you best in class weight to warm ratios with mainly synthetic insulation. We wrap the hybrid insulation in a baffled (not sewn threw) lightweight ripstop shell to complete the ultralight quilt! As a result, you don't have to sacrifice pack weight to stay comfortable and confident in your gear!
- PACK LESS: Not only does LoftTek Hybrid insulation have the highest weight to warmth ratio in its class, but it also is highly compressible!
- WATER RESISTANT PROTECTION: Mixing 80% LoftTek with 20% 800+ fill power down creates a synergy allowing the benefits of down, but the moisture advantages of synthetic. Water simply drains out of the bag while staying completely warm and lofted!
- Easily switches from use as a mummy sleeping bag to a pod system to fully insulate a hammock!
- Patented footbox allows hammock to run straight out of the bottom of the bag and seal, or zip it up for use on the ground and insulating baffles keep your feet warm!
- Redesigned shoulder baffles seal cold air out and add additional comfort!
- StormLOFT™ 800 fill power hydrophobic down provides premium performance in both loft, warmth and dealing with adverse weather conditions!
- NEW YKK Anti Snag Zipper makes it virtually impossible to damage your sleeping bag while zipping it up. It also provides easier zipper flow making it a breeze to get in and out!
- Vertical baffles keep the down locked into place both on the hammock and on the ground.
- Included suspension system keeps the bag from sagging or moving when using it on the hammock
- Extra shoulder room (grid) keep the bag extremely comfortable and roomy.
- Outdoor Vitals Lifetime Warranty: Here at Outdoor Vitals we believe in standing behind the craftsmanship and quality of our products. Anything that was our fault, we fix so you can feel confident that you're getting exactly what you paid for!
Get 10% Off & Free Priority Shipping By Joining The Live Ultralight Membership Here!
NEW INSULATION - LOFTTEK™ HYBRID: The most advanced, ultralight & packable synthetic in the world!
- FIRST OF IT’S KIND INSULATION: For year’s outdoor lovers have wanted the benefits of down insulation (lightweight, warm, compressible) without the downsides of down (fails when wet). Our new LoftTek Hybrid insulation utilizes cutting edge science to give you the benefits of down, without the downsides! This means you'll sleep warm and comfortably even if your gear gets wet on your adventures!
- ULTRALIGHT WEIGHT: 650+ fill power LoftTek Hybrid insulation fills the bag, which gives you best in class weight to warm ratios being mainly synthetic insulation. We wrap the hybrid insulation in a baffled (not sewn threw) lightweight ripstop shell to complete the ultralight sleeping bag! As a result, you don't have to sacrifice pack weight to stay comfortable and confident in your gear!
- PACK LESS: Not only does LoftTek Hybrid insulation have the highest weight to warmth ratio in its class, but it also is highly compressible! With the FREE compression bag we include, easily compress your sleeping bag to fit in any pack or space without needing to buy it separately!
- WATER RESISTANT PROTECTION: Mixing 80% LoftTek with 20% 800+ fill power down creates a synergy allowing the benefits of down, but the moisture advantages of synthetic. Water simply drains out of the bag while staying completely warm and lofted!
** If what you are looking for is still unavailable, use the "Notify Me When Available" button and we'll notify you when they are back in stock. Thanks! **
Get 10% Off & Free Priority Shipping By Joining The Live Ultralight Membership Here!
- Stay Warmer and Pack Lighter: Our micro polyester fabric weights only a few ounces, but can add another layer of insulation and warmth to your night’s sleep!
- Keeps Your Sleeping Bag Cleaner: When the insulation in your sleeping bag is cleaner, it performs better keeping you warmer. By using our sleeping bag liners, you keep your sleeping bag clean of dirt, sweat and other debris. This means your bag stays cleaner and warmer for longer! Oh, and you can easily machine wash the liner whenever needed!
- Feels Like Home: Even though our technical Micro Polyester fabric is built be extremely tough and wick away moisture, it still feels like the sheets off your bed! Climb into the liner and feel like your back in the comfort of your own bed!
- Limited Lifetime Warranty: Here at Outdoor Vitals we want you to get the high quality products you deserve. That's why we offer all our customers a lifetime warranty on all products!!