The Rab Mens Powerstretch Pant is an effective thermal layer suitable for all mountain use. Made with Polartec Power Stretch Pro insulating fabric, the Powerstretch Pant is light weight with flat lock seams and a minimal waistband to reduce bulk for efficient layering. Features Fabric: Polartec Power Stretch Pro' 53% Polyester/ 38% Nylon/ 9% Spandex Flatlock seams Internal security pocket Low bulk elasticated waistband Inside leg length 72cm/28inch(based on size large) Bluesign Approved fabric Glossary Polartec Power Stretch Pro'Polartec Power Stretch Prois a 4-Way stretch insulating fabric that allows for excellent athletic movement and great breathability to maintain comfort levels. It comes with Hardface technology for long lasting abrasion resistance. BluesignCompanies who gear their production to the Bluesign standard guarantee the consumer that, throughout the entire manufacturing chain, only those components and processes are used which are safe for humans and the environment.