This simple, waterproof, and compact cycling backpack boasts a surprisingly large capacity. * Lightweight design reduces strain on the body during extended use. * Provides a secure fit even during sports activities. * Features a helmet fixation cover for convenient helmet storage. * Equipped with reflective tape for safe use at night. * Mesh back panel promotes breathability and reduces fatigue during prolonged use. * Compatible with hydration systems (hydration pack not included). ◇ Versatile for Various Occasions ◇ Ideal for cycling, as well as marathon running, jogging, walking, mountain climbing, training, trekking, hiking, camping, fishing, strolling, and various other outdoor sports and activities. Its lightweight design also makes it suitable for seniors' walks! 【Capacity】 Approximately 5 liters 【Weight】 Approximately 330g 【Material】 Polyester 【Size】 Approximately 41cm (height) x 29cm (width) x 10cm (depth) 【Color】 Black (Kuro) 【Notes】 There may be some loose threads. 【Shipping Method】 Will be folded and shipped via simple packaging using Mercari delivery service. Please report any initial defects before leaving a rating.