5L Lightweight Running Backpack Outdoor Sports Trail Racing Marathon Hiking Fitness Bag Hydration Vest Pack75% Nylon, 25% Polyester Imported LIGHTWEIGHT: Made of firm, breathable, light and durable MATERIAL. Professional designed for Marathoner and other outdoor activity partners. MULTI FUNCTIONAL POCKETS: Enough pockets and pouches that can store items like cell phone, keys, thin raincoat, water bottle, hydration bladder and other items for outdoor activities. REFLECTIVE STRIPS: Reflective material which is quite luminous at any light ray at night ensures