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Description
Big Agnes Lost Dog 45F/7C Sleeping BagLIGHTWEIGHT SYNTHETIC FILL DESIGNED TO EXCEL IN WARM WEATHER Big Agnes System bags with FireLine ECO synthetic insulation offer a roomy, rectangle shaped sleeping space with an integrated Flex Pad Sleeve on the bottom. With technical fabrics and construction, 100% recycled, super warm insulation, and tons of comfort features, these comfortable sleeping bags are designed to be lightweight enough for backpacking but cozy enough you'll want them in the
LIGHTWEIGHT SYNTHETIC FILL DESIGNED TO EXCEL IN WARM WEATHER
Big Agnes System bags with FireLine™ ECO synthetic insulation offer a roomy, rectangle-shaped sleeping space with an integrated Flex Pad Sleeve on the bottom. With technical fabrics and construction, 100% recycled, super-warm insulation, and tons of comfort features, these comfortable sleeping bags are designed to be lightweight enough for backpacking but cozy enough you'll want them in the campground too. The streamlined silhouette and Flow™ construction increase the thermal efficiency keeping you warm from head to toe. The Flex Pad Sleeve unites easily with your pad, and as you change positions over the course of the night, will keep you from rolling off your pad.
Features
- The Big Agnes System bags offer technical, roomy sleeping spaces for those who aren't willing to sacrifice comfort or packability
- Streamlined silhouette for increased thermal efficiency
- Flex Pad Sleeve features stretch construction that accommodates multiple pad widths, and easily connects your bag to your pad
- Regular and Long bags fit 20" - 25" wide pads, Wide Long bags fit 25" - 30" wide pads
- Free Range Hood gives you the freedom to lift your head. Jacket-style hood opening contours to the shape of your face for a comfortable, snug fit
- Low-profile cordlock lets you un-cinch the hood with one hand
- Pillow Barn – keeps your pillow tucked in tight all night
- Internal hood drawcord gives you a secure, cozy fit when cinched
- Free Range Footbox - creates wiggle room for your feet
- Rectangular shaped bag
- Anti-snag zipper for a smooth, quick zip
- Regular: 65" / 165cm YKK #5 anti-snag locking zipper
- Long: 70" / 178cm YKK #5 anti-snag locking zipper
- Wide Long: 70" / 178cm YKK #5 anti-snag locking zipper
- Zipper Garage
- Mate together left and right zip bags
- No-draft collar, no-draft wedge, no-draft zipper
- Interior fabric loops for sleeping bag liners
- Exterior loops for hang drying or storage
- Mesh storage sack & polyester ripstop stuff sack
Specs + Sizing
| Bag Weight | Regular: 1lb 12oz / 794g / Long: 1lb 15oz / 879g |
| Fill Weight | Regular: 10oz / 283g / Long: 12oz / 340g |
| Compressed Bag Size | Regular: 6.5" x 5.5" / 17 x 14cm / Long: 6.5" x 6.5" / 17 x 17cm |
| Stuff Sack Size | Regular: S 7.5" x 15" / S 19 x 38 cm / Long: S 7.5" x 15" / S 19 x 38cm |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.2 ★★★★★
Based on 30 reviews
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Product Reviews
★★★★★ 4
Overall a great pillow
Fill Material: Down Alternative, Size: King Size, Fill Material: Down Alternative, Size: King Size
I slept on it last night and I do think I’ll like it. I was used to a memory foam pillow, son this will be a change. My reason for 4 stars is because the zipper barely opens and my husband and I tried everything short of ruining the pillow. In the end I had to stuff extra stuffing into a pretty small hole. Nothing seems wrong with the zipper but I saw another review said they couldn’t add more filling. If they fix that issue then I’d rate it 5. Yes it is soft but it doesn’t go flat and if you adjust and add some more under your head it doesn’t shift. I do recommend if you like a plush pillow.
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Reviewed in the United States on March 27, 2026
★★★★★ 5
Good Buy
Fill Material: Down Alternative, Size: Queen/Standard Size
Very well done and easy to use. I love being able to adjust the filling, and the ability to clean it.
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Reviewed in the United States on May 8, 2026
★★★★★ 5
excellent medium consistency pillow
Fill Material: Down Alternative, Size: Queen/Standard Size
Pillow is medium firmness with extremely uniform compression consistency. i have a very particular desire for something not too hard or too soft and this is the sweet spot... more stuffing is provided so you can add (or remove) some if needed to get what you like...i didnt need to but liked to have that option. also the feel of the cover is nice.
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Reviewed in the United States on May 31, 2026
★★★★★ 5
Immediately yes
Fill Material: Down Alternative, Size: King Size
I’m 50 and peri has been kicking my butt lately, so temperature management of my head (as that is the only thing effected by my hot flashes) has been an ever pressing project that I’ve been managing for the last 3-4 years. Hot sleeping has always been one of my curses, so adding perimenopause to the mix has been my own special hell. But Dyson fans, keeping the bedroom window cracked, and lots of all cotton gauze blankets have been imperative for me in the night. Pillows have always been pillowing, they just get warm and flipping them all night long is just finding the least hot version. I even keep 2 pillow choices on the bed while I sleep, and 2 more an arm’s length away on the chest at the bottom of the bed. Silk pillowcases are great for my hair and skin but they don’t keep cool. THESE PILLOWS, complete with the Beckham cooling pillowcases are chef's kiss. They feel like they’ve been in the fridge. Literally. Now do they stay that way, of course not. But they’re cool enough for me to fall asleep. And if I wake, I use the other side. And if I keep another on standby, I am literally finding the cool side of the pillow all night long. I’m not exaggerating either. These pillows are cool WITH the cooling pillowcases. You can’t use a pillow protector though, even if it’s cotton. It will ruin the effect. And you must use the cooling pillowcases. Do both, and you won’t be disappointed.
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Reviewed in the United States on March 9, 2026
★★★★★ 1
Terrible update to a good pillow
Fill Material: Down Alternative, Size: Queen/Standard Size
Purchased this as I was looking to replace tbe previous Beckham hotel pillows I had purchased before. When I saw "newer model available" I ordered it. Wish I had just ordered the same ones as before. First off this was only 1 pillow, not the 2 pack. Since I was only replacing 1 pillow I decided to use it. Huge mistake, my neck has been sore almost everyday. The support of this pillow is terrible, even with trying to added and remove some fill to adjust it. Nothing seems to make a difference. Avoid it and order a different model. Wish I had sent it back for a refund when I got it.
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Reviewed in the United States on April 13, 2026