1. Foam pad
advantage
No need to inflate, no fear of puncture, can be used by throwing on the ground, stable structure, and durable.
Disadvantage
Uncompressed, large in size.
The R value is low, and it is difficult to use it alone in a cold environment.
The cushion body is thin and cannot effectively filter part of the uneven terrain.
2. Inflatable cushion
advantage
When not inflated, the storage volume is small, the weight is light, and it is easy to carry.
The R value ranges from 2 to 7, suitable for various scenarios.
Disadvantage
Use requires aeration operation, once the puncture leaks, it will become waste in seconds.
The structure of the inflatable bag is not completely strong, and the damage of part of the internal connection will cause the air cushion to bulge and affect the use.
3. Self-inflating cushion
Self-inflating cushion is not a black technology, it just uses the inhalation and expansion capacity of open-cell foam to prop up the shape of the sleeping cushion. Its history is actually earlier than pure inflatable cushions, and the degree of technical integration is not as good as pure inflatable cushions. Its advantages and disadvantages are as follows:
advantage
Because a large amount of open-cell foam is added to the structure of the inflatable cushion, it can effectively keep warm and provide excellent comfort.
It is relatively convenient to expand by itself.
After being accidentally pierced, it still has good thermal performance.
The open-cell foam can be compressed, so the volume is relatively small when stored.
Disadvantage
Heavy weight, larger storage volume than air cushion
Under the same weight, the warmth retention performance is lower than that of foam cushions and pure inflatable cushions. The so-called "warm-to-weight ratio" is low. This point greatly offsets the other advantages of self-inflating cushions.
