I have sleeping pad for 7 months, and use it for 4 months in Thailand, since there the mattresses unfortunately are so hard. I am very pleased with the mat, it is very convenient and you can as far deflate until you have the right for themselves hardness achieved. You do not need an extra pump to 20 breaths you have already filled the self-inflating mat. The mat has only a slight crackling, but what can be avoided with a bed sheet covering a little. I bought the L mat, however, is 63 cm wide, 700 gr. Weighs. I am fully satisfied and will buy a second mat for my husband
