Bought this for the mountain bike and used once or twice max.  Just found USWE last year and it's my favorite brand, have another one for the road bike that I'll be using; no longer have the mountain bike so no longer need this.  Pack is 4l, bladder is 2l.  Any questions please ask. 


This USWE Vertical 4 Hydration Cycling Vest in Black is the perfect accessory for cyclists who value hydration and comfort. With a volume of 4 liters and a convenient 2-liter bladder, this vest offers ample space for fluids and other essentials. The vest is made from durable materials and features a sleek black design that complements any cycling outfit. Designed for cycling enthusiasts, this hydration backpack is suitable for all types of cycling, whether you're heading out for a leisurely ride or a more intense workout. The USWE brand is known for its quality products, and this vest is no exception. It offers a comfortable fit and easy access to your belongings, so you can focus on your ride without any distractions.