Outwell Sleeping Bag Caldera Prime image 1 Outwell Sleeping Bag Caldera Prime image 2 Outwell Sleeping Bag Caldera Prime image 3 Outwell Sleeping Bag Caldera Prime image 4 Outwell Sleeping Bag Caldera Prime image 5 Outwell Sleeping Bag Caldera Prime image 6 Outwell Sleeping Bag Caldera Prime image 7

Outwell Sleeping Bag Caldera Prime

£69.99(inc VAT) £80.00
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  Product Description
The Outwell Caldera Prime sleeping bag targets families and car campers who value comfort without excessive bulk. At 1.1kg, it packs down to a tidy 17x18cm, which fits easily into most camping setups. The shell uses 20D 400T polyester that feels surprisingly soft against skin, while the Bonded Isofill Premium filling (made from 100% recycled polyester) mimics down's loft without the moisture sensitivity. You get a comfort temperature rating of 13°C for women and 9°C lower limit for men, putting it squarely in the spring-to-autumn bracket for UK camping. The 190T brushed lining adds warmth perception, though it's not a winter bag by any stretch.

The built-in pillow is genuinely removable rather than just an elasticated pocket, giving you flexibility if you prefer your own. The L-shaped two-way zip runs the full length and down the footbox, letting you vent on warmer nights or zip it wide open for a duvet-style setup. Inside there's a small pocket for keeping a phone or headtorch within reach. The V-shaped stitching pattern reduces cold spots compared to straight baffles, and there's a full-length zip baffle to stop drafts sneaking through. The hood cinches down when temperatures drop, though taller people (above 190cm body length) might find the fit snug at the shoulders.

Outwell labels this as PFAS-free, which matters if you're conscious about forever chemicals in outdoor gear. The compression stuff sack includes a cap design that helps push air out as you pack. Seasons are listed as 1-2, meaning late spring through early autumn in British conditions. The left-side zip configuration means you can pair it with a right-zip model if Outwell makes one, though check compatibility before assuming they'll link together. At this price point, you're paying for the recycled materials and reasonable packability rather than ultralight performance or four-season capability.

Outwell Sleeping Bag Caldera Prime Features


  • Built in removable pillow
  • Compact pack size
  • Super soft polyester shell and down-like hollow fiber filling for a luxurious feel
  • Full-length zip baffle
  • Unique V-shaped stitching pattern
  • Easy glide zip System
  • Comfort hood
  • Inside pocket for storage of small essentials
  • Cap compression sack
  • PFAS free

Specifications
  • Art. No. : 230493
  • Barcode - Product : 5709388158543
  • Caring Choice : PFAS Free / Filling: 100% recycled polyester
  • Weight : 1100g
  • Textile fiber composition : Shell: 100% Polyester
    Lining: 100% Polyester
    Filling: 100% Polyester
    Carry Bag: 100% polyester
  • Size : 220 x 80 cm (LxW)
  • Pack size : 17 x 18 cm
  • Body length : 190 cm
  • Shell : 20D 400T polyester
  • Filling : Bonded Isofill Premium, recycled polyester
  • Lining : 190T brushed, embossed polyester
  • Zipper : 2 way open - auto lock, L-shape
  • Zipper side : Left
  • Construction : Single layer loose liner
  • Seasons : 1-2
  • Temp (Textreme) : -2°C
  • Temp (Tlimit) man : 9°C
  • Temp (Tcomfort) woman : 13°C

Frequently Asked Questions

What temperature range is the Outwell Caldera Prime suitable for?
The Caldera Prime has a comfort temperature of 13°C for women and a lower limit of 9°C for men, making it suitable for late spring through early autumn camping in UK conditions. The extreme rating goes down to -2°C, though that's survival territory rather than comfortable sleeping. This is a 1-2 season bag designed for warmer months, not winter camping.
Will the Outwell Caldera Prime fit someone over 6 feet tall?
The bag is designed for a body length of 190cm, which is approximately 6 feet 3 inches. If you're taller than this or have broad shoulders, the fit becomes snug when fully zipped. The overall bag dimensions are 220x80cm, but the tapered design means the extra length doesn't translate to comfortable shoulder room for larger users.
Is the Outwell Caldera Prime filling synthetic or down?
The Caldera Prime uses Bonded Isofill Premium, which is 100% recycled polyester synthetic filling designed to mimic down's loft characteristics. This means it maintains insulation when damp, unlike natural down which loses effectiveness when wet. The synthetic filling works better in humid British camping conditions where condensation is common.
Can you zip two Outwell Caldera Prime bags together?
The Caldera Prime has a left-side zip configuration, so it would theoretically pair with a right-zip version to create a double sleeping setup. You need to confirm Outwell makes a right-zip Caldera Prime model and that the zipper systems are compatible before purchasing with this intention, as not all sleeping bag zips match even within the same brand range.
How does the removable pillow work on the Caldera Prime?
The built-in pillow is genuinely removable as a separate component rather than just being an elasticated pocket in the hood. This gives you the option to take it out completely if you prefer using your own camping pillow, or keep it in place for integrated head support. The removable design adds flexibility depending on your comfort preferences.
What does PFAS-free mean for the Outwell Caldera Prime?
PFAS-free means the sleeping bag is manufactured without per- and polyfluoroalkyl substances, which are persistent chemicals that don't break down in the environment or human body. Many older camping products used PFAS for water and stain resistance. Outwell has removed these from the Caldera Prime's construction, making it a more environmentally conscious choice for campers concerned about forever chemicals.
What's the pack size of the Outwell Caldera Prime when compressed?
The sleeping bag compresses to 17x18cm using the included cap compression stuff sack. At 1.1kg weight, this makes it manageable for car camping and family trips where space is limited but not critical. The cap design helps push air out as you pack the bag down, making compression easier than traditional drawstring stuff sacks.
Is the Outwell Caldera Prime suitable for backpacking?
At 1.1kg, the Caldera Prime sits in the heavier range for backpacking sleeping bags. It's designed for car camping and family trips where weight isn't the primary concern. Backpackers typically look for bags under 1kg, often in the 600-800g range. The Caldera Prime prioritises comfort and recycled materials over ultralight performance.
EAN-13 : 5709388158543
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If you’ve changed your mind about keeping your purchase, please return it in its original condition with proof of purchase and we’ll exchange or refund it. Unless faulty, this should be within 100 days of receiving your order. By original condition, we’d expect this to mean that you’ve kept packaging and labels, and that the item is undamaged and unused.

For further information of how to return your item, please visit the "Returning an Unwanted/Faulty/Damaged Item" section on our Help Page.
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