Built for the people who count on it
Ultimate Thule -20°F Mummy Sleeping Bag specifications
| Temperature rating | -20°F (-29°C) |
|---|---|
| With FTRSS Overbag | -60°F (-51°C) |
| Insulation | Lamilite |
| Shape | Mummy |
| Sizes | Regular/Regular · Long/Regular · Regular/Wide · Long/Wide (wide recommended) |
| Colors | 9 shell colors (interior color varies) · right zipper standard, left available |
| Made in | Colorado, USA |
| Note | Long/Regular is not available with the Boat Foot |
Ultimate Thule -20°F Mummy Sleeping Bag FAQ
How cold is the Ultima Thule rated?
It's rated to -20°F. With the FTRSS Overbag, the Ultima Thule FTRSS is rated to -60°F.
What size should I get?
We recommend a wide width, since the top half of the bag has double the insulation. Call us at 970-241-6465 if you want help choosing.
Is there a Boat Foot version?
Yes, the Ultima Thule is also made with a Boat Foot, which adds insulation at the foot end. Long/Regular isn't available in the Boat Foot.
Will it stay warm if it gets wet?
Lamilite is a continuous filament insulation that keeps insulating when it gets damp, and it dries fast.
Is it covered by a warranty?
Yes. It's covered by the Wiggy's Limited Lifetime Warranty against defects in materials and workmanship for the original purchaser.
Still have a question? Call 970-241-6465. A real person answers.
Every piece is built in our own shop.
One insulation. Everything we make.
Most bags stitch right through their insulation. Every seam is a cold spot. Wiggy's Lamilite is one continuous layer with nothing stitched through it. It breathes, keeps working when it gets damp, and dries fast.
- For families: no cold spots, so everyone sleeps warm.
- In the field: keeps insulating when it's wet.
- For programs: in service for decades, not seasons.
- At the edge of the map: rated to -60°F.
Outfitting a team?
Rescue units, wilderness programs, camps, and research teams: we'll help you spec the right bags and quantities.