The Proviz REFLECT360 Backpack is unisex and fully adjustable and received the prestigious 'Highly Commended' review from Cycling Plus Magazine and the Evening Standard's 'ES Top Pick' for Cycling Commuting Backpacks. Itis designed to be an extremely comfortable fitted rucksack that fits closely to your body so that you are completely stable under use. Using 100% CE EN 20471 certified reflective material, the Proviz REFLECT360 backpack's millions of integrated reflective beads helps other road users to identify your position on the road at night. The backpack includes many added extras including waterproof AquaGuard® zips, adjustable waist/hip strap, adjustable chest strap, webbing haul, gear loops, mesh pockets, laptop compartment and a light loop to make this rucksack the ultimate rucksack for many types of use. The integrated BES Beetle ventilation system helps to ensure good airflow between the bag and your back to help avoid an uncomfortable clammy back! About the fabric: The fabric used for the REFLECT360 range is highly technical. During daylight it is a modest grey colour. At night, when the fabric picks up an external light source, eg vehicle headlights, it gives 'astonishing reflectivity' (quote: Cycling Active Magazine). The material is CE EN 20471 certified. 30 litre capacity / Dimensions: 54 x 34cm | Adjustable hip/waist belt | Laptop compartment | Adjustable chest strap (height and girth) | Light loop (to add LED light) | Front zip pocket | Waterproof AquaGuard ®zips with double slides and cord pulls | Mesh side pockets | Highly water-resistant material: 1500mm water column | Webbing carrier handle | Elastic shoulder strap loops for accessory attachment | Elastic loop for accessory attachment | Spacer-mesh back ventilation system | Hydration bladder compatible