Time Sale! Ends irregularly. Lightweight and perfect for outdoor sports such as running, cycling, mountain climbing, hiking, and camping. Stored item, unused and in good condition. *The whistle color is orange. The chest support can be adjusted in height according to your physique. With lightweight bands, it reduces stuffiness on the back, is highly durable, has excellent breathability, and provides a good fit. The back section does not stick to the body, and the structure is designed for comfort, stability, and breathability based on ergonomics, so it won't be uncomfortable even when worn for long periods. The inside is all mesh, which provides good ventilation and reduces discomfort on the back. The front pocket is also waterproof and can store a 350ml bottle, a small smartphone (small inch size), keys, etc.! *The model and detailed images are illustrative using display items. The actual product may differ slightly. Approximate chest size: 80cm - 120cm (adjustable) *Shipping method is scheduled to be Nekopos. Management number: A053-210