Body: 4.6-oz 88% polyester/12% spandex with four-way stretch and a DWR (durable water repellent) finish. Waistband: 8.6-oz 85% recycled polyester/15% spandex jersey with miDori™ bioSoft for added wicking and softness, and Polygiene® permanent odor control. Fabric is certified as bluesign® approved