Features: Intelligent: using polyester meshed fabric, reflective webbing, zippered design, and strategic water pipe outlet to enhancing functionality and comfort. Storage capacity: Multi compartment design with water bag warehouse, elastic pocket and zipper pocket, can accommodate 6.6-inch mobile phones. Safety features: Equipped with urgent sound device and reflective detail to enhancing visibility, durability waterproof structure ensures outdoor protections. Adjustable: Adjustable chest circumference adjustment and soft fabric ensuring comfortable wearing during running, hiking, and camping activities. Water replenishment: dedicated kettle hanging strap and integrated water bag compartment, with piping design for convenient water replenishment. Specifications: Fabric: Nylon, polyester meshed fabric, reflective webbing Size: 46x22x7cm/18.11x8.66x2.75inch Attribute: black, gray, blue Package Includes: 1Pc Vest Backpack note: Other accessories demoed in the pictures is not included. Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.