A self-inflating mat is basically a layer of compressible (open cell) foam sandwiched inside an airtight envelope of fabric with a sealable valve. When you open the valve, the foam expands and sucks air into the mat. The foam works as a built-in pump and provides the insulation by trapping still air within the mat. Self-inflating mats fill the gap between thin foam roll mats, and bulky heavy air beds. All you need to do is roll the mat out on the floor, twist the nozzle to open it and let air in, and leave them to inflate by themselves. They offer a layer of air between you and the tent floor, and are much comfier than traditional roll mats!

We stock a wide range of self-inflating mats, from low-cost entry level mats to slightly more technical, smaller, lightweight mats that are more suitable for backpacking trips where every bit of rucksack space is important.

Below are 3 self-inflating mats (or SIMs) that we recommend.

Vango Trek Mat £31.95

The Trek mat from Vango is the perfect sleeping mat for when durability, strength and affordability are of great importance. The small pack size and lightweight make it suitable for all campers. The Trek Pro 3 Standard mat is ideal for those who care about the environment they are exploring as its made from recycled TrekEco® Fabric Recommended by the Duke of Edinburgh Award Scheme, these products are independently tested by members of the DofE organisation and feature on the DofE Recommended Kit List.

Vango Comfort Mat £59.95

The luxurious Vango Comfort 7.5cm single self-inflating sleeping mat offers unrivalled comfort and convenience with a durable non-slip base. With the Cyclone Flip Valve, inflation and deflation are very quick. Simply flip open the valve and watch the mat expand. Prefer a firmer mattress? Simply top it up with a few extra puffs of air. After a great night's sleep, the Cyclone valve's large opening means the air evacuates quickly, making packing away really easy.

Vango California Mattress £84.95

Designed specifically for campervans, the new California POP sleep mat offers ultimate comfort for campervanners. Created from 75 Denier, soft, brushed fabric with 3D construction to ensure the entire surface area can be used, you can enjoy a comfortable night's sleep wherever you go. It features a twist valve for easy inflation and fuss-free deflation.