Sleeping pad types usually trade-off weight for different degrees of warmth. Pads have advantages and disadvantages, the big key is to find the type that best meets your needs.
These sleeping pads are made of a lighter but fragile foam which is comparable to a sponge. They’re being light and plush is an advantage. The disadvantages are they can absorb water vapor, which can be a big problem if they don’t get a chance to dry out completely. Insulation is better than empty chamber air mattresses but not as good as a closed-cell foam sleeping pad. You will need a lot thicker open-cell sleeping pad to have a comparable insulation value of a closed-cell foam sleeping pad. This makes them much more bulky.
Durable and dense foam materials make up a closed-cell sleeping pad. The plus of closed-cell foam is that it insulates well because the small cells trap warm air from your body. Closed-cell foam is less likely to absorb moisture, so the whole pad won’t get soaked when water seeps up through your tent floor. A disadvantage is they’re a little heavier and they’re not as plush because they don’t compress as easily under pressure. You will need more closed-cell foam to get the same level of comfort as with open-cell foam, which means a little more weight.
This type of pad is made with open-cell foam sandwiched-and-sealed between sheets of plastic. You store them rolled-up/compressed when not in use so when they’re unrolled and the inflating valve is opened the expanding foam causes air to be drawn inside and they “self-inflate”. With open-cell foam being sealed between plastic it insulates better than open-cell foam alone. The sealing between plastic also helps keep the inside drier. Be aware though, by blowing into a self-inflating mattress to make it firm faster will dampen the inside of the mattress and could encourage mold and bacteria growth.
I hope this will help you decide on which sleeping pad is best for you.