What kind of sleeping mat do you take with you on a trek? A compact, lightweight mat that provides sufficient insulation for what you are going to do, is a good trekking mat. The more space you have in your backpack (or the more space and weight you are willing to carry for your night's sleep), the easier it is to opt for more comfort. The lightest mats are around 50cm. If you want a bit more width, a mat is often around 65cm. Two person mats are also available. The standard length of a mat is around 180cm, but they come in lengths of over 2 metres. If a foam layer provides the insulation, the type of mat is a self-inflating mat. These self-inflatables are very stable. If the construction or a fibre layer provides the insulation, then it is an airbed. Airbeds are often more compact and lighter. Look here for all lightweight mats or go directly to the self-inflating mats or airbeds.