UTOBEST Running Backpacks Lightweight Hydration Pack Functional Running Vest 5.5L

FABRICS:Nylon,Elastic Power Mesh,YKK Zipper,Capacity:5.5L Size:44*20cm/17.3*7.9Inch Pocket:1 Main Compartment;2 Water Bottle Pockets,3 Small Pockets;
LIGHTWEIGHT BACKPACK:Extra-light Stretch Fabrics,Only 250g,Help You Go Further And Higher Every Time;
BREATHABLE&COMFORTABLE:Made With High-density Mesh, The Fabric Breathes And Evacuates Moisture;Ergonomic Design, Adjustable Belt,Fit Body, More Comfortable;
HYDRATION SYSTEM:Bladder Compartment With Hanging System, Compatible With 1.5L Bladder (not included);
SECURITY: Front and Back Reflective Strip Design,Safety For Running Riding In Dark Conditions.