Thermarest Xlite Warmth Over the Years?
Posted: Sun Jan 23, 2022 9:55 pm
Have Neoair Xlites got warmer over the years? They are currently listed as an R value of 5.4 under the new ASTM system.
I've got a 2013 vintage Thermarest Neoair Xlite, which is a great mat and despite a lot of patches is showing no signs of giving up the ghost.
However, when camping (even in the height of summer), I generally get quite cold at night (with an appropriately rated quilt) and often end up wearing a baselayer, fleece and down jacket in my quilt.
I've always put this down to being a cold sleeper... but last weekend, I did my first winter bikepack... normally when I have camped in winter, its been on foot, and I have always taken a closed cell foam mat to double up with the xlite out of habit. Obviously couldn't do that bikepacking, because I couldn't figure a way of carrying a CCF mat on the bike. Overnight, despite being in my -9 comfort bag, I was pretty cold, and could really feel the cold through the mat.
So that got me thinking. At home I'm not a cold sleeper at all, and I don't remember being that cold many years ago on my old Exped Synmat (that the Xlite replaced). So could it actually be the 2013 Xlite is just not very insulative? But the current ASTM value of 5.4 is pretty high.
So have the Xlites got substantially warmer somehow (different internal design maybe?) over the years?
Note that I always run the Xlite at pretty much max pressure, always inflated by pumpsack, so its not moisture or suboptimal inflation causing a problem.
I've got a 2013 vintage Thermarest Neoair Xlite, which is a great mat and despite a lot of patches is showing no signs of giving up the ghost.
However, when camping (even in the height of summer), I generally get quite cold at night (with an appropriately rated quilt) and often end up wearing a baselayer, fleece and down jacket in my quilt.
I've always put this down to being a cold sleeper... but last weekend, I did my first winter bikepack... normally when I have camped in winter, its been on foot, and I have always taken a closed cell foam mat to double up with the xlite out of habit. Obviously couldn't do that bikepacking, because I couldn't figure a way of carrying a CCF mat on the bike. Overnight, despite being in my -9 comfort bag, I was pretty cold, and could really feel the cold through the mat.
So that got me thinking. At home I'm not a cold sleeper at all, and I don't remember being that cold many years ago on my old Exped Synmat (that the Xlite replaced). So could it actually be the 2013 Xlite is just not very insulative? But the current ASTM value of 5.4 is pretty high.
So have the Xlites got substantially warmer somehow (different internal design maybe?) over the years?
Note that I always run the Xlite at pretty much max pressure, always inflated by pumpsack, so its not moisture or suboptimal inflation causing a problem.