- 7.2
- 72 × 22 cm
- 2.470 g
- 5.9
- 68 × 20 cm
- 1.770 g
- 2.1
- 26 × 12 cm
- 110 g
How a self-inflating mat works
Inside is an open-cell foam core. When you open the valve, the foam expands and draws in air. A few strokes with the pump sack bring the mat to the firmness you want: more air if you sleep on your back, less if you sleep on your side. Even with little air, the foam keeps insulating.
Before first use: blow a little air in and leave the mat with the valve open, so the foam can expand fully for the first time.
Vasta 5.0 and Vasta 7.5 compared
| Model | R-value | Weight | Dimensions | Packed size | Material |
|---|---|---|---|---|---|
| Vasta 5.0 | 5.9 | 1,770 g | 196 x 63 x 5 cm | 68 x 20 cm | 3D foam, 30D/75D stretch polyester with TPU |
| Vasta 7.5 | 7.2 | 2,470 g | 198 x 68 x 7.5 cm | 72 x 22 cm | 3D foam, 30D/75D stretch polyester with TPU |
R-value to ASTM F3340, weight without stuff sack, dimensions inflated or laid out (length x width x height). All values from Wechsel product data 2026.
How the Vasta is built
Both Vasta mats follow the Core Comfort Concept: insulation is highest in the centre section to keep your torso warm. Horizontal punch-outs in the 3D foam save weight and let more air into the mat. The stuff sack doubles as a pump.
Vasta 5.0
5 cm thick, R-value 5.9, 1,770 g. Packs to 68 x 20 cm. For campsites and holidays, including frosty nights. View the Vasta 5.0 →
Vasta 7.5
7.5 cm thick, R-value 7.2, 2,470 g. At 198 x 68 cm our largest mat. For car camping and winter nights. View the Vasta 7.5 →
Self-inflating, air or foam?
Self-inflating mats sit between the other two types: more comfortable and warmer than a foam mat, heavier and bulkier than an air mat. For trips with a rucksack or bike, lighter options are listed under ultralight sleeping mats.
Valve replacement by our repair service
If the valve on your self-inflating mat fails, our repair service replaces it. Store the mat unrolled with the valve open between trips so the foam stays springy. More under Care & Cleaning.
Self-inflating mat FAQs
Does a self-inflating mat inflate fully on its own?
The foam draws in most of the air. Top it up to the firmness you want with the pump sack.
What thickness do I need?
5 cm, as on the Vasta 5.0, is enough for most nights in a tent. 7.5 cm, as on the Vasta 7.5, feels softer and insulates even more with an R-value of 7.2.
Is a self-inflating mat suitable for backpacking?
The Vasta mats weigh 1,770 and 2,470 g and are designed for camping. For backpacking, an air mat such as the 490 g Aera M from our ultralight sleeping mats is the better choice.
Are the Vasta mats suitable for winter?
Yes. With R-values of 5.9 and 7.2, both are among our insulated sleeping mats.
How should I store the mat?
Unrolled, with the valve open, dry and out of direct sunlight. Kept compressed in its stuff sack, the foam gradually loses its spring.