This mask has cotton on the inside and a softshell outside (lined with fleece). I do not know the studies of not using double cotton, but the softshell fabric is very thick.
Good to keep you warm on the hill or on the flat land!
This mask has cotton on the inside and a softshell outside (lined with fleece). I do not know the studies of not using double cotton, but the softshell fabric is very thick.
Good to keep you warm on the hill or on the flat land!