I love the size of this (lightweight) vest. The water bottles are easy to use while running, and also refill. The vest's light fabric has a lot of flex/stretch - so it feels comfortable when running and it doesn't bounce much. My one complaint is the zipper on the back busted on my second use.... I'm going to take it to a seamstress to see if they can replace the zipper, but it's definitely annoying to have to pay to fix something thats brand new. I think if Nathan used a different zipper the vest would be perfect!

This is a great pack for those looking for a very minimalistic pack. I ended up going with the 4L Nathan's women's hydration pack because it allowed a little room to pack some extra snacks and there was a better place to store my phone. Other than that, its a great pack and highly recommend.