100% polyester. Length: 78cm. Width: 32cm. Depth: 24cm. Expandable 10 litre top section for additional storage. Highly reflective printed panels in strategic zones for enhanced visibility. Hardwearing polyester fabric. EVA foam and comfort airmesh shoulder straps. Ultra padded air mesh back system with hook and loop ladder system for a personalised rucksack fit. Air mesh adjustable hip belt to help stabilise pack weight. Adjustable sliding chest harness. Side compression straps. Soft micro mesh water bottle side pockets. Lower zipped storage compartment with internal drawcord divider. 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: UTRG4412