Outwell Self-inflating Mat Sleepnest Double 5cm image 1 Outwell Self-inflating Mat Sleepnest Double 5cm image 2 Outwell Self-inflating Mat Sleepnest Double 5cm image 3 Outwell Self-inflating Mat Sleepnest Double 5cm image 4 Outwell Self-inflating Mat Sleepnest Double 5cm image 5

Outwell Self-inflating Mat Sleepnest Double 5cm

£164.99(inc VAT) £195.00
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  Product Description
The Outwell Sleepnest Double self-inflating mat measures 200 x 120 cm with a 5 cm profile, making it one of the better options for couples who need proper sleeping space when camping. The zoned support system uses strategically placed cut-outs across the mat's surface, which means you get ergonomic support where your body needs it whilst keeping the overall weight down to 3.25 kg. The double flat high-flow valve speeds up both inflation and deflation, something you'll appreciate after a long day setting up camp. The mat uses TPU-coated construction bonded to 30D stretch polyester on the top and sides, with tougher 190T 75D material on the bottom.

This matself-inflates when you open the valve, though like most self-inflating mats, you'll want to add a few breaths to get it properly firm. The 3D shape with deep profile creates space for your shoulders and hips to sink in slightly, which helps if you're a side sleeper. Those extra-large foam cavities compress well for storage, rolling down to a packed size of 64 x 21 cm. That's reasonably compact for a double mat, though it won't fit in smaller rucksacks. The stretch polyester has what Outwell calls soft-on-skin technology, so you can sleep directly on it without a sheet if you want to, though some people still prefer using a fitted sheet.

The TPU construction resists delamination better than traditional PU coatings, which tend to separate from the foam core after repeated rolling and temperature changes. Outwell has made this mat PFAS-free, responding to growing concerns about these chemicals in outdoor gear. The included carry bag has compression straps to help you get the mat packed down, though you'll need to be methodical about rolling out all the air first. One consideration is that self-inflating mats don't insulate as well as dedicated insulated mats in cold weather, so if you're camping below about 5°C, you might want additional insulation underneath.

Outwell Self-inflating Mat Sleepnest Double 5 cm Features


  • Deluxe zoned support for great comfort
  • Double Flat High-Flow valve enhances air flow
  • 3D shape with deep profile for ultimate comfort
  • Ultra tough stretch polyester with soft-on-skin technology
  • Delamination-proof TPU construction for extreme durability
  • Extra large foam cavities enhances comfort while reducing packed size and weight
  • Carrybag for easy storage and transportation
  • PFAS free

Specifications
  • Art. No. : 400145
  • Barcode - Product : 5709388160447
  • Fabric : Top and side: 30D stretch, bottom: 190T 75D, TPU coated
  • Weight : 3.25 kg
  • Textile fiber composition : Fabric: 100% Polyester
    Carry Bag: 100% polyester
  • Size : 200 x 120 x 5.0 cm (LxWxH)
  • Pack size : 64 x 21 cm
  • Valve : FHF Valve

Frequently Asked Questions

How does the Outwell Sleepnest Double self-inflate?
When you open the double flat high-flow valve, air pressure forces the compressed foam cavities inside the mat to expand, drawing air in through the valve opening. The process takes approximately 3-5 minutes to reach around 80 per cent inflation. You'll then need to add several breaths through the valve to firm the mat to your preferred comfort level. The self-inflation works best at temperatures above 10 degrees Celsius, as colder conditions slow down foam expansion.
Is 5 cm thickness sufficient for side sleepers on this double camping mat?
The 5 cm profile combined with the 3D shape design provides adequate cushioning for most side sleepers up to around 95 kg per person. The zoned support system with strategically placed cut-outs allows your shoulders and hips to sink slightly into the mat whilst maintaining support for your lower back and legs. Heavier individuals or those with existing back conditions might find a 7.5 cm or 10 cm profile more comfortable for extended camping trips.
What's the difference between TPU and PU coating on camping mats?
TPU (thermoplastic polyurethane) construction bonds more securely to the foam core and polyester fabric than traditional PU (polyurethane) coatings. PU coatings tend to delaminate after 2-3 years of use, particularly when mats are stored rolled for long periods or exposed to temperature fluctuations between storage and use. The TPU construction on the Outwell Sleepnest maintains its bond integrity for 5-7 years under normal camping use, resisting the separation that causes traditional camping mats to develop air pockets and uneven surfaces.
Why does PFAS-free matter for camping mats?
PFAS (per- and polyfluoroalkyl substances) are synthetic chemicals previously used in camping mat coatings for water and stain resistance. These chemicals don't break down in the environment and accumulate in human tissue over time. The European Union has restricted PFAS use in consumer products since 2023, and outdoor equipment manufacturers have responded by developing alternative coating technologies. The Outwell Sleepnest uses PFAS-free TPU coating that still provides water resistance whilst meeting current environmental and health safety standards.
How long does the Sleepnest Double take to fully inflate and deflate?
Full inflation takes approximately 5-7 minutes from opening the valve, which includes the 3-5 minutes for self-inflation plus the time needed to add 8-12 breaths for proper firmness. The double flat high-flow valve design speeds up deflation to around 2-3 minutes when you open both valve sections and roll from the opposite end. Starting your deflation process whilst packing other camping gear makes this timing negligible in your overall pack-down routine.
What insulation properties does this self-inflating mat provide?
Self-inflating mats like the Sleepnest Double provide basic thermal insulation through the air-filled foam cavities, suitable for camping temperatures down to approximately 5 degrees Celsius ground temperature. The 5 cm thickness offers an estimated R-value around 3-4, which provides adequate insulation for spring through autumn camping in the UK. For winter camping or when ground temperatures drop below 5 degrees, you'll need to add a closed-cell foam mat underneath or use a higher R-value insulated sleeping pad to prevent cold transfer from the ground.
Can you repair punctures in the Outwell Sleepnest Double mat?
Yes, punctures in the TPU-coated polyester can be repaired using standard camping mat repair kits with TPU patches. Clean the punctured area thoroughly, apply the adhesive patch following the kit instructions, and allow 24 hours for the adhesive to cure fully before re-inflating. The 190T 75D bottom material is tougher than the top surface and less prone to punctures, though it repairs using the same method. Small punctures under 5 mm typically seal effectively, whilst larger tears may require professional repair or replacement of the affected section.
How should you store the Outwell Sleepnest Double between camping trips?
Store the mat fully inflated or loosely rolled with the valve open in a cool, dry location away from direct sunlight. Keeping the mat stored tightly rolled in its carry bag for extended periods compresses the foam cavities, which reduces their ability to self-inflate effectively over time. If storage space is limited, roll the mat loosely without the compression straps engaged, allowing the foam to maintain its cellular structure. Clean the mat surface with mild soap and water before storage to prevent mould growth, and inspect the valve mechanism twice yearly to ensure it remains free from debris.
EAN-13 : 5709388160447
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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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