The Patagonia Girl's Happy Hike Pants are hiking pants made of polyester/spandex with 4-way stretch and button tab feature for adjustable length. Features: Lightweight, abrasion-resistant blend of polyester and spandex for mobility, drape and easy care Smooth, fixed waistband with external belt loops; waistband adjusts with internal buttonhole-elastic and button Zip fly with button closure Two front pockets; two drop-in back pockets Button tab feature allows pant legs to be rolled up Fabric is certified as bluesign approved Weight: 6.3 ozMaterial: 88% polyester/12% spandex See "Overview" below for sizing information.