These Adidas tights are great for winter running or base layer to keep warm. This is the warmest ones Adidas makes I believe. They are technically running pants/ tights but I used them mainly as a base layer during winter outside activities for 1 season. The tag size is “Asian Sizing” Medium because I bought I bought these in the Adidas store in China when I lived there. It is roughly equivalent to a US size Small. I normally wear S and these fit me great. They have a drawstring waist, they zip up the ankles, and have a rear right side zipper pocket. They are sort of fleece lined and all the detail is reflective.