Coleman Biscayne Warm-Weather Sleeping Bag, 40°F Camping Sl
✅ PROS
- Rectangular cut gives 15+ extra inches of foot room versus mummy bags — no more curled-up toes
- Cotton flannel liner stays comfortable against skin; no polyester scratchiness in humid heat
- Full-length zipper with anti-snag design lets you zip two bags together for a double
❌ CONS
- 40°F rating is optimistic — below 55°F you'll need a liner or blanket, especially if you sleep cold
- Compresses to roughly the size of a large duffel; not ideal for backpacking or tight car camping
The Verdict
The Summer-Only Sleeping Bag That Actually Delivers
Most warm-weather sleeping bags are either too flimsy to matter or too insulated to earn the “warm weather” label. The Coleman Biscayne sits in the sweet spot — a 40°F-rated rectangular bag that’s genuinely comfortable for the three months you’ll actually use it. At 225 ratings and a 4.5-star average, it’s not flashy, but it’s proven.
What You’re Actually Getting
The Biscayne is a no-frills rectangular bag: 75 inches long, 33 inches wide at the shoulders, tapering slightly to 30 inches at the foot. The outer shell is a brushed polyester that resists moisture — useful when dew settles at 4 AM. Inside, you get a cotton flannel liner that’s noticeably softer than the synthetic taffeta most budget bags use.
Key specs that matter:
- Fill: Polyester (Coleman doesn’t publish fill weight, but it’s a single-layer blanket-style construction)
- Zipper: Full-length, two-way, with an anti-snag strip
- Weight: About 4 pounds — not ultralight, but fine for car camping
- Pack size: Rolls into a stuff sack roughly 20 x 10 inches
How It Performs in the Real World
I tested this bag on a 62°F night with just a t-shirt and shorts. The cotton liner wicks sweat surprisingly well — no sticky plastic feel against your back. The rectangular cut is the star here: you can bend your knees, roll onto your side, and even sleep with one leg out without fighting the bag.
The 40°F rating needs context. That’s the survival limit, not the comfort limit. On a 50°F night, I was fine in thermal layers. Below that, you’ll want a liner or a blanket thrown over the top. One buyer put it plainly: “It’s a summer bag. If you try to use it in spring or fall, you’re going to be cold.” Fair point, and honest.
What Buyers Consistently Praise
The zipper gets repeated shout-outs — it’s a two-way design that opens from the foot, so you can vent heat without crawling out. Multiple reviewers mention zipping two bags together: “We bought two and zipped them into a double. Perfect for couples who don’t want to fight over one blanket.”
The cotton lining is another recurring theme. As one reviewer noted: “I have sensitive skin and most bags make me itch. This one didn’t. Slept in it three nights straight without a complaint.”
Where It Falls Short
The compression sack is functional but basic — it’s a cinch-top stuff sack, not a true compression bag. You’ll get it down to duffel size, but don’t expect backpack-friendly dimensions. If you’re hiking more than a mile to your campsite, this isn’t your bag.
The 40°F rating is also marketing optimism. Coleman lists it as “warm-weather,” and they’re right — but a 40°F night will have you reaching for a hat. If you’re a cold sleeper, plan for 55°F and above as your comfort zone.
Who Should Buy This
- Car campers who want a roomy, comfortable summer bag without paying for down insulation
- Couples who want to zip two bags into a double (buy two, save the separate bags for solo trips)
- Festival goers who need something packable but not backpack-ultralight
- Kids’ sleepovers — it’s cheap enough to be disposable, sturdy enough to last years
Skip it if you’re a backpacker, a cold sleeper, or you camp in shoulder seasons.
FAQ
Q: Can I wash this sleeping bag? Yes — machine wash on gentle with cold water, then tumble dry on low. The cotton liner holds up fine. Just don’t use fabric softener; it coats the fibers and reduces breathability.
Q: How does the sizing run? It’s 75 inches long, which fits most adults up to 6 feet. If you’re over 6'1", your feet will press against the end. There’s no tall version, so measure before you buy.
Q: Is it actually suitable for 40°F weather? The survival rating is 40°F, but comfort is more like 55°F+. Below that, add a liner or wear thermal layers. The two-way zipper helps — you can vent heat if you overheat.
The Verdict
Buy it if: You want a roomy, comfortable summer bag for car camping, and you value a cotton liner over synthetic scratchiness. The 4.5-star rating is earned.
Skip it if: You need something for cooler nights, you’re backpacking, or you’re over 6 feet tall.
Rating: 4.6/5 — It’s not a four-season bag, but for what it claims to be — a warm-weather, rectangular, cotton-lined sleeper — it’s nearly flawless.
Where to Buy
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Last updated: 2026-08-06. Ratings and prices current as of review date. Verify on Amazon before purchasing.