Russell comfort performance short leg boxer briefs are 57% cotton/ 38% polyester/ 5% spandex. They have Tri-Blend softness for all day comfort. It has dri-power 360 moisture wicking to keep you dry. They are brand new in famous brand packaging. The packs say 100% cotton but they are not! They are 57% cotton/ 38% polyester/ 5% spandex.