Nathan Men's Pinnacle 12L Hydration Race Vest with 4L Hydration Pack. Two 20oz Hydration Soft Flask, Water-Resistant Pockets, Lightweight & Moisture Wicking

This vest fit great and did not chafe. The material is nice and the water bottles that come with it worked well. It did not leak

I love the compression fit. Stays in place. Very easy access to water, and lots of pockets for gels, phone, etc. Will be using this during long runs and at the NYC Marathon.

Fits a little too tight, material is wearing faster than expected even with hand washing. My canteen is defective the hydration powder won't rinse out. I'm waiting for a response from Nathan's. I'm sure they'll replace it.

Good fit, comes with 2 flak’s and can purchase a bladder for more fluids if needed

Nice fit, the sizes tend to go on the smaller side, so if you plan to buy it, go for the bigger size. Wish it had more pockets.

I’m a female, about 5’6” 190 lbs and I got the medium Pinnacle which fits perfectly. I have honestly never had a more comfortable vest and I’ve had the other brands - Salomon, ultimate direction, etc. I love the water bottles with the straws, the zipper pockets and the slip pockets in the back. The material is so soft it feels like a t shirt and it’s so lightweight. When adding a bladder, there’s good balance in weight between the front and back and as long as you push the air out of the bladder, there’s not much sloshing.I was down to the osprey duro 6, Salomon adv skin 5 or Nathan Pinnacle 4L and I’m sooooo glad I went with the Nathan!! 5 star product.

I'm 6'2" and 215lbs and I got the large at first, then switched to the XL, which fit much better. Upon using it, I discovered that one of the bottles had a pin-hole leak in it. Very disappointing, especially given how expensive this vest is. I wrap the leaky bottle in a plastic bag when I run now and at least I don't get wet, but I would still prefer that it actually worked. Update: I contacted support through Amazon and via email and never got a reply or replacement. I will definitely never buy another Nathan product again.

I was a little nervous after putting it on after it was delivered and how tight it felt, but once I took it out running it was perfect. Fits nice and snug and doesn't move or bounce at all when running the trails. I was right on the border of a small and medium when I measured and went with the small and I think I made the right choice. I'm just under 6ft and 180lbs.