Breathable, Lightweight, And With Convenient Pockets

Highly Visibility: Reflective material keeps the wearer safe when walking, running, hiking, at night.

High-quality Material: Made of durable, breathable, and lightweight material.

Multi-functional Pockets: Pockets and pouches can store a variety of items like 1.5L water bladder, water bottles, thin rain ponchos, cell phones, and more.

Adjustable & Versatile: Fully adjustable and breathable design allows a full range of motion for all runners, joggers, bikers, kids, and adults

Comfortable Fit: This backpack gives a comfortable fit over sports gear and accommodates the most body sizes. Two sizes available: S/M, L/XL.

Specifications:
✓ Color: Black
✓ Size: S/M (For chest circumference 80-97cm)
✓ Size: L/XL (For chest circumference 97-109cm)
✓ Capacity: 5L
✓ Compatible with 1.5L water bladder (not included)
✓ Size: 41 x 39cm / 16 x 15in
✓ Net Weight: 230g / 240g
✓ Package Size: 32 x 13.5 x 6cm / 12.6 x 5.3 x 2.4in
✓ Package Weight: 342g / 12.1oz

Included:
— 1 X Marathon Hydration Vest Pack
— 1 X Emergency Blanket
— 1 X Koozie