Excellent vest and just what I was looking for! I have signed up for my first ultra and as my training runs are getting longer, I was finding it more difficult trying to carry enough water so usually had to stop off at a shop. I have now used the vest on a couple of 15 mile runs as well as shorter runs and it handles both perfectly. For longer runs, I can use the 1.5l bladder filled with water and a 500ml soft bottle filled with water and electrolytes. As the fluids are carried close to the body, you don’t notice the extra weight and it allows me to carry plenty so I know I won’t run out. For shorter runs, I can just take either the bladder or 2 x 500ml soft bottles. There are plenty of pockets for snacks, money, phone etc, so I feel safe knowing I have everything that I may need at hand. Brilliant product!