In almost all camping situations, the ground will be colder than the human body. When you lie down, heat is transferred from your body to the ground by conduction. In this case, your sleeping bag can’t keep you warm because all the padding under your body is compressed. This squeezes out all the insulating air, which means your sleeping pad is the only thing keeping you warm from below. Here introduce:
The types of the sleeping pad
The types of the sleeping pad introduce.
Foam pads are made of highly insulating closed cell foam. This foam contains many tiny sealed air pockets that provide insulation from the ground below. Although foam pads have been around for decades, their low price and durability have always been the most widespread and simple choice for outdoor players;
The self-inflating pad uses open-cell foam, wrapped in a durable outer fabric. When you open the valve, this foam springs back into shape, sucking in air and expanding the cushion. Most pads will inflate in about 5 minutes, but you may need to take a few breaths to add air.
Due to their small size, air mattresses are increasingly favored by lightweight backpackers and bike backpackers who lack space. Insulation is provided by still air within the cushion chamber. Some brands use reflective foils, synthetic insulation and down, space cotton for extra warmth in air mattresses, which complicates the production process and makes the product more expensive.