I bought this for my husband (5'10'') whose legs always feel cold while travelling to and from work during winter. He says this thermal pant is very comfortable and he does not feel tight or stuffy wearing it. It is soft and does not irritate the skin even though he has been wearing it whole day long. The material is medium- its not too thin(thicker than a normal tee-shirt), but not thick as sweater. It fits very well even under a tight fitting jeans. I ordered just one to try it out and am ordering more of these for my husband. Do try one- it does what it says.