Ultralight and comfortable: at only 0.14 kg, this hydration vest sits close to your body and does not interfere with workout efficiency. Breathable and durable material: crafted from a nylon and polyester blend with density mesh to promote dependable breathability and effective waterwicking for a comfortable wear. Easy hydration storage and organized space: large main compartment with ample pockets provides quick access to hydration and a wellorganized place for all essentials in this cycling water backpack. Night safety and survival features: reflective strips on the shoulders and back enhance visibility in low light, includes a builtin whistle, and comes with essential survival accessories for safer nighttime travel in this hiking water backpack. Practical use scenarios: Cycling commutes and road rides that require quick, reliable hydration without bulk. Long trail hikes and day trips where you need organized storage and easy access to essentials. Nighttime urban travel or lowlight outdoor activities requiring visibility and safety features. Specs and attributes: Weight: 0.14 kg ultralight design Material: nylon and polyester fabric with density mesh Storage: large main compartment and multiple pockets for hydration and gear Safety: reflective strips on shoulders and back; builtin whistle Includes essential survival accessories for hiking use