The classic sleeping mat comes in a closed cell foam material - the legendary Karrimat, for example. Self-inflating mats are now increasingly popular, Therm-a-rests being the most common examples. You can also buy (rather pricey) down-filled mats to keep you super-warm.
Buyers' Guide - Sleeping Mats
From classic closed cell foam pads all the way through to the extraordinary sub-100 gramme Balloon Bed, we give you the gen on buying a comfy sleeping pad.