A three-season sleeping bag built to keep campers comfortable on chilly spring and late-autumn nights, the Mountain Warehouse Summit Sleeping Bag balances warmth with roomy, duvet-like space. Perfect for festival-goers and casual backpackers who dislike cramped sleeping arrangements. Is the long-length, left-hand zip option the sensible choice for taller campers?
⚡ At a Glance
- • Warmth: Comfort temperature around 5°C with a limit of 0°C for cold-but-not-freezing nights
- • Best for: Backpackers and festival campers seeking roomy, insulating sleep through spring and autumn
- • Not ideal for: Overnight use in freezing conditions or true winter mountaineering
Hollow-fibre fill traps warmth while an envelope shape gives extra internal space. Long-length and durable rip-stop outer fabric improve fit for taller users and hold up to frequent outdoor use.
Keeps you warm on chilly nights - with hollow fibre insulation
Hollow-fibre stuffing creates numerous tiny air pockets that slow heat loss and insulate without using down. The synthetic fill retains loft when damp and dries faster than down.
Comfortable sleep down to about 5°C and usable down to around 0°C, making the sack suitable for early spring and late-autumn trips. Reliable warmth even for damp-weather camping.
Roomier sleeping space - with an envelope shape
Envelope, essentially rectangular, construction removes the narrow footbox typical of mummy bags and increases internal volume. The design allows easier movement and more layering beneath the cover.
Duvet-like comfort for campers who roll around or prefer sleeping with extra layers. Easier to share or use with an inner sleeping mat.
Built to last on the trail - with rip-stop fabric
Rip-stop outer weave includes thicker threads at intervals to contain any tears and slow fabric damage. Heavy-duty fabric also tolerates abrasion better than lighter shells.
Greater resistance to snags and tears when used on rough ground or at festivals, so the bag stays serviceable through repeated trips. Practical choice for rough-and-tumble outdoor use.
✨ The 4 Key Reasons for Mountain Warehouse Summit Sleeping Bag
- Rip Stop Fabric – Resists tears, extending lifespan during frequent outdoor use
- Envelope Shape – Generous internal space for layers and duvet-like comfort
- Lightweight Packed Size – Compacts to 23cm x 36cm for easy backpack stowage
- Long Length – 215cm option accommodates taller sleepers, reducing foot-end squeeze
📋 Technical Details at a Glance
- Category: Sleeping bag
- Season rating: 3-season (spring, summer, late autumn)
- Comfort temperature: 5°C / 41°F
- Limit temperature: 0°C / 32°F
- Insulation: Hollow fibre stuffing
❓ Frequently Asked Questions
Q: Is the bag suitable for winter camping?
A: No. The comfort temperature of 5°C and limit of 0°C indicate suitability for cold nights that are not freezing, so it is not designed for sub-zero winter camping.
Q: What lengths are available and who do they suit?
A: Two lengths are noted: a regular length at 200cm suited to users up to 180cm, and a long length at 215cm aimed at taller sleepers who need extra foot room.
Q: How bulky and heavy is the bag for backpacking?
A: Packed dimensions are approximately 23cm x 36cm, with a weight of 1.4kg for the regular length and 1.6kg for the long length, making it manageable for short trips and festivals.
🏆 Our Verdict
The Mountain Warehouse Summit Sleeping Bag suits campers and festival-goers who want roomy, reliable warmth without the fuss of down care. Hollow-fibre insulation, an envelope shape and rip-stop fabric combine to deliver cosy nights and durable performance. A practical, long-lasting option for three-season use that pays off over regular outdoor trips.
