Self inflating mattresses have overtaken airbeds as the camper's choice as a bed. Airbeds have had a history of deflating or changing as the temperatures change in the night, and do not offer much insulation from the cold ground. Where as SIMS (self inflating mats) offer more warmth, and a more reliable night's sleep. The technology has massively improved, with the new valves making the mattresses as easy to deflate, as they are to inflate, and allowing for easier topping up of the mat to achieve the firmness and depth desired. The Vango Trek mattress is ideal for the campers needing a lightweight and comfortable solution that will fit easily into a rucksack. However, the Comfort series of mats offers greater depth, comfort and a flocked finish to give better warmth from the cold ground. By far the most popular is the Outwell Dreamcatcher Double Self Inflating mattress, perfect for family camping and providing a durable mattress with plenty of depth and comfort.