【Ultra-lightweight 297g】This is a compact runner's backpack. Recommended for those who want to concentrate on running without their belongings swaying during intense exercise. Comfortable Fit and Amazing Lightness Ultra-lightweight design at only 297g! It's so light you'll forget you're wearing it, and it won't hinder your running performance. Wide, breathable shoulder straps and an adjustable chest strap that conforms to your body securely fasten the pack. With a drawcord to prevent your belongings from swaying, the pack and its contents become one. You can run with the feeling of carrying nothing at all. Large Capacity 15L! Ample Storage Space With a 15L capacity, you can carry all the gear you need. The shoulder pockets are easy-access, allowing you to take out your smartphone, energy gels, energy bars, etc., without stopping your run. Side pockets can store bottles and poles. It also supports a hydration system, allowing for smooth hydration. Why not take your running to the next level with this high-performance running pack that supports a comfortable run? It will be folded to A4 size and shipped via Yu-Yu Mercari Mail (Yu-Packet Post).