Features:_x000D_1 Lightweight and easy to carry: this hydration backpack with a capacity of 5 litres weighs only 330g The back and shoulder straps are equipped with a foam ventilation system that creates air flow when wear Breathable and durable, it is suitable for outdoor sports such as hiking, cycling, skateboarding, running and fitness _x000D_2 Ergonomic design for comfortable wearing: The ergonomic design of the running backpack with water bladder is suitable for different body types The shoulder straps are adjustable to fit you perfectly, preventing the pack from moving and reducing bounce The durable shoulder straps are soft and comfortable, you feel less pressure and are always balanced _x000D_3 Breathable and lightweight backpack for jog: made from ultra-lightweight, waterproof and tear-resistant 420D interlockings striped fabric that won39;t weigh you down during exercise Less resistance ensures that your body works at maximum performance Mesh and porous design on the back and shoulder straps with ventilation channels to accelerate air flow and keep your back cool A running or cycling backpack in breathable material to meet your needs _x000D_4 For your comfort: Ergonomic design with adjustable waist and sternum straps for men, women and children The sternum strap ensures that the pack doesn39;t bounce when you move around Perfect for hiking, running, marathons, cycling, etc The bike hydration backpack with water bladder is also a great cycling companion _x000D_5 The perfect outdoor equipment: Lightweight jog backpack with a unique design for optimum comfort and freedom of movement Reflective strips give you extra visibility in low light conditions _x000D_Notice:_x000D_1 Actual color may be slightly different from the image due to different monitor and light effect_x000D_2 Please allow 1-3cm deviation due to manual measurement_x000D_3 The color of the water bag is Blue tube_x000D_ _x000D_Description:_x000D_Fabric: 420D chain stripes_x000D_Lining: 210T_x000D_Weight: backpack: 330g, water bag: 120g_x000D_Capacity: backpack: 5L, water bag: 2L_x000D_Size: As picture showPackage List:_x000D_1x Hydration Backpack Set