1. Reflective design makes it safer to travel at night
2. Double buckle design, easy to wear, more convenient to travel
3. Breathable mesh cloth, light and breathable, does not hurt the hair
4. Multi-adjustable design, neck circumference and chest circumference can be adjusted
5. Rhombus Oxford cloth, resistant to dirt and easy to clean, feels good
6. Alloy D ring, the traction rope is evenly stressed
7. Material: Oxford cloth + SBR diving material
8. Size: S/M/L/XL
9. Weight: S is about 155g, M is about 190g, L is about 200g, XL is about 220g