I bought this from Amazon for $24.90 last December. I don’t trailrun but I have been on about 15 hikes with it. It has two front pockets where I put my iPhone and a 500ml water bottle. I put my jacket in the straps in the back. This version holds 15L but there similar 5L and 10L versions. You can also search under LERMX or X-Cat that has versions that come with water bladder. I don’t have experience with the more expensive brands but quality-wise they held well after 3 months and 15 hikes. Packs are personal but I really like this vest. Hope this helps. https://www.amazon.com/gp/aw/d/B0759Y6TDS/ref=pd_aw_sim_sbs_468_1?ie=UTF8&refRID=TGBPFT984J7TBR4XNKP1&dpPl=1&dpID=51u468YJx6L&th=1&psc=1