Review on CamelBak Nano Running Hydration Vest - Running Accessories - 3D Micro Mesh - Adjustable Sternum Straps - Phone Pocket - Storage for Fuel and Gear - 34 Ounce by Troy Simpson

I've worn camelbak for years and love it. This vest meets their usual quality standards. The bottles hold firmly in the pockets and are easy to drink and the smaller pockets are perfect for gels etc. And they are very light even with full bottles. I wear medium sized shirts and do weightlifting. medium nano vest and found it a bit tight even after adjusting the straps. So for me I'd probably go a size up, but maybe it's a good fit for those with a more "correct" runner's upper body.