Manufacturer image: Cosac
Manufacturer image: Ultimate Sack
Our take
Cosac 6ft offers a stated 72-inch diameter and a verified $299 complete price in our snapshot. Ultimate Sack 6000 is a substantial foam alternative with a 60–68-inch stated width range. Compare those facts, then confirm the current Ultimate Sack configuration price directly.
Our picks compare published specifications and named configurations. We have not physically tested these products. Prices were checked on October 1, 2026, before tax, with no coupon assumed. How we choose
The comparable details.
| Model | Complete price | Published dimensions | Fill | Outer cover |
|---|---|---|---|---|
| Cosac 6ftSherpa-fleece cover, inner liner and filling included | $299 | 72 in diameter | Shredded memory foam | Removable, machine-washable sherpa-fleece cover. Follow the sewn-in care label. |
| Ultimate Sack 6000Complete chair; fabric selection varies | Check current priceConfiguration price not verified | About 60–68 in across × 34–38 in high | New shredded polyurethane foam | Removable, washable outer cover; follow the care label. |
Dimensions describe different forms: width, diameter and diagonal are not interchangeable. All figures above are manufacturer-reported. See each linked profile for caveats.
Choose Cosac 6ft if…
You prioritize a clear complete price, larger stated diameter and lower listed weight.
Choose Ultimate Sack 6000 if…
You prefer the 6000’s format and documented construction details after confirming its exact configuration.
What changes the decision.
The product name is not an exact dimension
Ultimate Sack’s 6000 label does not mean the product is exactly six feet across. Its maker gives a range that depends on fluffing, the occupant and surface.
The listed weights differ materially
Cosac 6ft is about 40 lb; Ultimate Sack lists about 70–75 lb. Extra weight is not automatically extra comfort, but it matters if you expect to move the seat.
Layered construction is useful in both
Both descriptions separate the washable outer cover from a filled liner. Ultimate Sack also specifies double stitching and a child-lock zipper; we report those as maker descriptions, not test certificates.
What we have not established
We have not compared these products in a controlled sitting, washing or long-term wear test. The model descriptions support conclusions about the purchase, format and published care, but not a universal winner for comfort or quality.
Cosac 6ft: Dimensions, weights and capacity descriptions are manufacturer specifications, not measurements taken by the Edit.
Ultimate Sack 6000: The 6000 name does not establish an exact 72-inch diameter. Construction statements are manufacturer descriptions, not independent certification.
A few useful answers.
Is Ultimate Sack 6000 exactly six feet wide?
The manufacturer gives an approximate 60–68-inch width range. Use that range rather than interpreting the product name as exactly 72 inches.
Sources behind this guide
Manufacturer pages establish the specifications below. They do not independently establish comfort, durability or superiority. Source details checked October 1, 2026.
- Cosac — Cosac size range and configuration detailsPrimary manufacturer source · Checked October 1, 2026
- Ultimate Sack — Ultimate Sack 6000 product and configuration detailsPrimary manufacturer source · Checked October 1, 2026