- 30 × 37 cm
- 1.740 g
- 20 × 35 cm
- -2 °C
- 1.120 g
What makes a winter sleeping bag
A winter sleeping bag keeps you warm at and below freezing. It needs more fill, a hood you can draw tight around your face and a well-covered zip. This category lists our sleeping bags with a comfort rating of 0 °C or lower – our 4-season sleeping bags.
4-season sleeping bags compared
| Model | Fill | Comfort | Limit | Weight M / L | Compressed size |
|---|---|---|---|---|---|
| Pyro 750 | Down | -2 °C | -8 °C | 1,020 / 1,080 g | 20 x 28 cm |
| Mudds Winter | Synthetic | 0 °C | -5 °C | 1,580 / 1,860 g | 30 x 30 cm |
Comfort and limit temperatures from Wechsel product data 2026. Weight without stuff sack in size M (body height up to 175 cm) / L (up to 195 cm). Compressed size in size M (diameter x length).
Pyro 750 or Mudds Winter?
Pyro 750: down
The Pyro 750 has a -2 °C comfort and -8 °C limit rating at 1,020 g, compressing to 20 x 28 cm – for winter trips with a rucksack or pulk.
Mudds Winter: synthetic
The Mudds Winter has a 0 °C comfort and -5 °C limit rating at 1,580 g. With a draught collar and VolumeShift, and less sensitive to moisture – for winter car camping or several nights in a row.
No warmth without the right mat
Under your body the fill is compressed and barely insulates; your sleeping mat stops the heat loss downwards. In winter you need a mat with an R-value of 5 or more. On snow we recommend the Facila Comfort AX foam mat underneath and an air mat on top – around R-value 8.0 together. More under Insulated sleeping mats.
Staying warm on winter nights
Draw the hood in until only your mouth and nose are free. Sleep in dry clothes, not the ones you sweated in during the day. On the Mudds Winter, use VolumeShift to reduce the foot section so there is less air to warm. Air your sleeping bag in the morning to let the night's moisture escape.
4-season sleeping bag FAQs
What is a 4-season sleeping bag?
A sleeping bag that keeps you warm in frost in winter too. Ours are the Pyro 750 (comfort -2 °C) and the Mudds Winter (comfort 0 °C).
Which sleeping bag for -10 °C?
We have none with that comfort rating. The Pyro 750 has a -8 °C limit: at that temperature you can just about sleep curled up without feeling cold.
Down or synthetic in winter?
Down is lighter and packs smaller. Synthetic loses less warmth when damp – an advantage if you are out for several nights without a chance to dry your bag.
Which tent suits winter trips?
Dome and geodesic tents spread wind and snow load across several pole arches. See our dome & geodesic tents. No tent is completely freestanding; to get the best from it, always use pegs.