Lightweight 10L running vest backpack, model C911610L, designed for runners, hikers, cyclists, and marathon training. Compact and breathable, it keeps essential gear secure and accessible while minimizing bounce for a smoother outdoor experience. Key benefits Lightweight and compact: Weighs about 240g for longwear comfort during runs and rides. 10L capacity: Room for hydration bottles or a small hydration bladder, snacks, phone, keys, and lightweight layers. Organized storage: Multiple compartments and pockets provide quick access and tidy organization. Stable fit: Antibounce design and adjustable straps help reduce movement for a steady carry. Breathable and comfortable: Main fabric is 85% nylon and 15% spandex with polyester fibre mesh for airflow and reduced chafing. Improved visibility: Reflective strips increase visibility in lowlight conditions. Unisex fit: Designed for all genders with adjustable sizing to match different body types. Use scenarios Longdistance running: Carry soft flasks, energy gels, a phone, and small items without added bulk. Trail hiking: Store snacks, a light windbreaker, and essentials while keeping weight balanced and movement steady. Cycling and training: Keep tools, hydration, and valuables within reach during rides and group training sessions. Specifications Model: C911610L Capacity: 10L Weight: about 240g Material: 85% nylon, 15% spandex Net cloth: polyester fibre Department: Unisex Application position: Back Available colors: blackwhite, blackred, blue, whitered, orange Recommended sizes: S: 6678 cm M: 7890 cm L: 90102 cm XL: 102115 cm This running vest backpack provides practical storage, a secure fit, and breathable comfort for outdoor activities where low weight and easy access to essentials matter.