I have been hiking and camping for a while and have tried many different mattress starting with a straw filled hessian bag and over the years I have moved from sleeping on the ground to self inflating mattresses and finally airbeds.
It has been a long, and sometimes uncomfortable journey, with many turns and even a few u turns. You can read a lot about my experiments over a number of years here.
You will notice in the earlier post my love for the Klymit mats. However, for a while I went away from the Klymit mats because of their weight, but a long dark night in November 2014 made me realise that there was more to comfort than low weight. Consequently, I returned to Klymit. Why? I here you ask, the answer is simple they feel wider and are comfortable allowing me to have a restful nights sleep.
Since November 2014 I have been using the Klymit Insulated Static V for the long and cold winter nights. The Insulated Static V weighs 704 grams with an R value (US) of 4.4 has been my mat of choice. My experience, when using the Klymit mat has been that it initially does not feel as warm as the Thermarest Xtherm (US R value 5.7). However, the perceived extra warmth of the Xtherm, I believe, is due to the reflective baffles of the Thermarest in contrast to the layer of insulation adhered to the inner of the Klymit Mat, which insulates. For me after a couple of minutes I notice no difference in the insulative properties of the two mats.
Why did I return to Klymit from the Xtherm? I recognised that the shape of the XTherm did not work for me, as it felt narrow especially at the lower (leg) end. I also felt that the horizontal baffles, whilst supportive, also had me “hanging on” in case I rolled off, or perhaps I should say “I felt the need to maintain my position on the centre of the mat” thereby providing a less restful experience.
In contrast the Klymit mat, being marginally wider, and with its body mapped design immediately made me feel more relaxed and less concerned about “rolling off”. As well the Insulated Static V with its 75D fabric has meant that I am less concerned about punctures, though I always use a ground sheet. This heavier fabric comes at a cost of a higher weigh than the Thermarest offerings.
Summing up, the Klymit mats are heavier and their R values are lower than the Thermarest mats, but I value comfort, over anything else, particularly on long winter nights in a tent. For summer, I will use the Klymit Static V2, which has a weight of 465 grams and an US R value of 1.3.
As an aside recently visited the local retailer who sells Klymit products, and he showed me the XLarge Static V (or Static V Luxe as it is known) and I was impressed with the rolled up size of this 76 cm (30″) wide mat.
Will I change to another mat in the future, maybe, but it will need to be more comfortable than the Klymit Static V range, time will tell.