100% polyester. Highly reflective printed panels in strategic zones for enhanced visibility. Hardwearing polyester fabric. EVA foam and comfort airmesh shoulder straps. Mesh vented stream air back system with metal frame support for additional comfort. Air mesh adjustable hip belt to help stabilise pack weight. Adjustable sliding chest harness. Side compression straps. Soft micro mesh water bottle side pockets. Internal hydration storage pocket and drinking tube retainer. Zipped front pocket. Zipped lid pocket. Internal key clip. Integral bungee walking pole holders. Detachable raincover. Ref: UTRG4413