99% Cotton 1% Elastane Denim with Cordura patches – 283 gsm / 10 oz. Cordura knee patches compatible with Syzmik Knee pad for enhanced comfort, enzyme washed, modern straight leg stretch fit, metal zipper and stud button closure, triple stitched in-leg seam, Cordura reinforced hem and pockets to increase durability, reinforced at key stress points for increased durability, ruler pocket, Syzmik branded rivets.