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BaseCamp PROcomfort to 0 °C
£39.95
From £31.99 a bag in the 4-pack · compression sack included
- No cold feet at 3 am, from spring to autumn.
- Comfort to 0 °C. Hood with drawstring keeps the warmth in.
- Rolls into its compression sack in a minute. Just 1.2 kg.
Perfect forTentFestivalCampervanGuest bed
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- Free delivery over £35
- 40-day money-back guarantee. Not for you? Send it back for a full refund
- Over 1 million customers trust BOLLSEN
What’s in the box
Sleeping bag + compression sack. Roll it up, pack it, done.

BaseCamp PRO210 × 65 cm · 1.2 kg
Choose
StormShell Expert Down230 × 80 × 50 cm · 1.5 kg
Choose
Compression sackIn the box. Packs the BaseCamp to approx. 35 × Ø 40 cmIn the box. The down compresses small enough for a rucksack
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Temperature guide
Which bag for which night?
Think of the coldest night of your trip, then allow a few degrees in reserve. Below 0 °C, take the StormShell Expert.
The BaseCamp PRO is rated by its comfort temperature (0 °C). The StormShell Expert is rated by its extreme temperature (−25 °C). The StormShell also covers mild nights: just open the zip part of the way.


BaseCamp PRO
Warm from spring to autumn.
- Polyester fill keeps you warm down to 0 °C
- Hood with drawstring keeps the warmth at your head
- 210 × 65 cm, grey
- Made for the tent, festivals, the campervan and as a spare bed for guests
StormShell Expert Down
Warm all night, even when the tent frosts over.
- Duck down holds your body heat on cold nights
- 400T polyester outside: tough and wind-resistant
- 400T polyester inside: soft on your skin
- 230 × 80 cm, room to turn over


StormShell Expert Down
Compresses small enough for a rucksack.
- Roll it up, into the compression sack, done
- Only 1.5 kg for a bag rated to −25 °C extreme
- Fits a trekking rucksack, not just the boot
BaseCamp PRO
Rolls small enough for the boot.
- Roll it up, into the compression sack, done
- Carry it one-handed from the car to the tent
- Packs to approx. 35 × Ø 40 cm, fits any car boot
- Honest note: a bit big for long treks


StormShell Expert Down
Room to turn over.
230 cm long and 80 cm wide: room for tall people and side sleepers too. The drawstring hood keeps the warmth where it belongs.
- 230 × 80 × 50 cm
- Hood with drawstring
- 400T polyester inside: soft on your skin
- Milder night? Open the zip part of the way
BaseCamp PRO
No cold feet at 3 am.
Polyester fill keeps you warm down to 0 °C. Too warm on a summer evening? Just open it up.
- Hood with drawstring keeps the warmth in
- Zips on both sides: in and out without a tangle
- Open the bottom to let air in
- Unzip it fully and it’s a blanket
Find your bag
Two bags, one question: how cold will your night be?
The BaseCamp PRO keeps you warm from spring to autumn. The StormShell Expert with duck down gets you through frosty nights.

Spring to autumn
BaseCamp PRO
For nights down to 0 °C.
- Comfort to 0 °C
- Zips on both sides
- 1.2 kg, packs to approx. 35 × Ø 40 cm
£39.95 · 2 for £71.95

Frosty nights
StormShell Expert Down
For cold nights, below zero too.
- Extreme to −25 °C
- 50 % duck down, 400T polyester
- 1.5 kg, compresses small
£59.95 · 2 for £107.95
- Compression sack with both bags
- Hood with drawstring on both
- 40-day money-back guarantee on both
Side by side
BaseCamp PRO vs. StormShell Expert
Same idea, different nights. Here is what sets them apart.
| BaseCamp PRO | StormShell Expert Down | |
|---|---|---|
| Temperature | Comfort to 0 °C | Extreme to −25 °C |
| Best for | Spring to autumn | Frosty nights, autumn to winter |
| Fill | 100 % polyester | 50 % duck down |
| Outside / inside | Polyester / polyester | 400T polyester / 400T polyester |
| Size | 210 × 65 cm | 230 × 80 × 50 cm |
| Packed | Approx. 35 × Ø 40 cmFits any car boot | Compresses smallFits a trekking rucksack |
| Weight | 1.2 kg | 1.5 kg |
| Colour | Grey | Green |
| In the box | Sleeping bag + compression sack | Sleeping bag + compression sack |
| Price | £39.952 for £71.95 · 4 for £127.95 | £59.952 for £107.95 · 4 for £191.95 |
40-day money-backFree delivery over £35Compression sack included
Specs at a glance
The numbers behind a warm night.
- Model
- BaseCamp PRO
- Comfort temperature
- 0 °C
- Fill
- 100 % polyester
- Outside / inside
- Polyester / polyester
- Size
- 210 × 65 cm
- Weight
- 1.2 kg
- Packed size
- Approx. 35 × Ø 40 cm
- Colour
- Grey
- In the box
- Sleeping bag + compression sack
- Guarantee
- 40 days money-back
- Model
- StormShell Expert Down
- Extreme temperature
- −25 °C
- Fill
- 50 % duck down
- Outside / inside
- 400T polyester / 400T polyester
- Size
- 230 × 80 × 50 cm
- Weight
- 1.5 kg
- Packed size
- Compresses small, fits a trekking rucksack
- Colour
- Green
- In the box
- Sleeping bag + compression sack
- Guarantee
- 40 days money-back
FAQ · BOLLSEN sleeping bags
Questions? Answered.
Straight answers about the BaseCamp PRO and the StormShell Expert, from temperature to washing.
Which bag for how cold?
Nights above 0 °C, from spring to autumn: BaseCamp PRO. Nights below 0 °C, from autumn into winter: StormShell Expert Down. Allow a few degrees in reserve below the coldest night you expect.
What do “comfort 0 °C” and “extreme −25 °C” mean?
The BaseCamp PRO is rated by its comfort temperature: it keeps you warm down to 0 °C. The StormShell Expert is rated by its extreme temperature of −25 °C, the coldest it is made for. So on very cold nights, allow some reserve with the StormShell too.
How big are they?
BaseCamp PRO: 210 × 65 cm. StormShell Expert: 230 × 80 × 50 cm, so tall people and side sleepers have room to turn over. Both have a hood with a drawstring.
How small do they pack?
Both come with a compression sack. The BaseCamp PRO packs to approx. 35 × Ø 40 cm and weighs 1.2 kg. It fits any car boot, but it’s a bit big for long treks. The StormShell Expert weighs 1.5 kg and, thanks to the down, compresses small enough for a trekking rucksack.
Can I open the bag up?
The BaseCamp PRO has zips on both sides. Open the bottom to let air in on warm evenings, or unzip it fully and use it as a blanket. On the StormShell Expert, open the zip part of the way on milder nights.
How do I wash them?
BaseCamp PRO: wash at 30 °C on a gentle cycle, no fabric softener. StormShell Expert: wash at 30 °C with down detergent, then tumble dry on low with two tennis balls. Let both dry completely and store them loosely.
Anything I should watch out for?
Keep the bags away from open fire, gas stoves and patio heaters. Only let small children sleep in a sleeping bag under supervision. Dry the bag fully before you pack it away.
When will my order arrive?
Delivery is free on orders over £35, otherwise it costs £4.95. The bags are dispatched from our EU warehouse and arrive in 5–10 working days.
What if it’s not for me?
You have 40 days. Email hello@bollsen.co.uk, send the bag back and we refund you in full.
