First thing to say is I'm a road runner not a trail runner. I'm training for a marathon and needed something to carry my phone, gels and water. I have a couple of belts but the weight is just too for a belt and the bouncing is a real problem. So I purchased the Harrier Curbar 5 l and it's brilliant! I also purchased 2 500ml flasks with extended straws and a 1.5 l bladder. I've done 2 20 mile runs 1 with 2 water bottles and the other with the bladder, both times I was impressed with how easy carrying that much water felt, so much easier than a belt. You can still feel the weight but it's comfortable and secure. There's plenty of storage and my Google pixel 6 pro with otter defender case fits easily in the back. The front pockets are perfect for gels and so easy to access on the move. It's easy to have electrolyte gels, isotonic gels and caffeine gels in different pockets for easy identification on the move. The quality of the vest is great. Really happy 😁