NathanQuickStart 2.0 4 Liter Hydration Pack with 1.5L Bladder, Front & Back Pockets for Essential Storage, Breathable & Moisture Wicking

Comfortable, more so than my previous purchase. Slightly larger than the previous one. Lot more pockets, even the inside pockets has compartments. Only down side no night reflectors. Will definitely purchase again in a few months

I love this vest. I had to get a unisex due to small women's sizing. I love the pockets. I got the 500 ml nathan water bottles too. I use them on daily runs when I don't want to have to clean the bladder. Very comfortable. I'm a water fanatic and wouldn't venture out without it.

Super comfortable; I don't notice it at all while running. Lots of pockets for snacks and gear too.

There's a lot I love about this backpack, however few design flaws have few drawbacks on the general satisfaction. I intended to use this backpack on longer adventure races (running, biking, swimming, canoeing) to carry all the mandatory and additional gear needed for 24+h racing. My experience when using Nathan Pinnacle close to its maximum capacity:Negative side1) the side pockets do not have any fasteners and there's a risk of losing the gear/stuff on the track. These pockets are quite secure while the backpack is carried due to the tension from the elastic material, but as soon as the pack is taken off, there's nothing to prevent stuff falling off from these pockets (which I experienced). A zipper fastener's (like on Nathan's VaporAir) would take off the stress of losing anything from these pockets on the track;2) the kangaroo-style pockets for clothing have only small velcro fastener to close up the pocket opening which is opening downwards of the bag. Unfortunately, when the back is filled, this velcro fastener tends to come loose very easily. Once the small velcro gets loose, there's not much to keep the stuff in these pockets, thus carrying the risk of losing the gear unnoticed on the track (I lost one). The velcro fastener also tends to stick to wool-made (merino) clothing, carrying a risk of damaging it (got experience with that). More secure fastner (e.g. zipper) would be a way better solution to secure these pockets.Neutral3) Sizing can be tricky. The size recommended by Nathan was a way too small.Positive side;4) the bag is really lightweight;5) it is really comfortable to wear, does not bounce in any conditions;6) plenty of different compartments for easy gear organization;7) durable. While passing through forest with dense dried spruce branches, the fabric got several scratches but did not rip;8) good quality insulated HydraPak hydration pack included, although 1.6L is rather small volume considering that the size of this bag is probably aimed for a longer duration events;

Love all the pockets and the ability to use the bladder and strap pockets for flasks. Used for many different activities and has been great for all. Easy to wash and keep clean.

This is the best piece of gear I’ve ever bought. I am 5’3 and 143 pounds and bought a small. It fits perfectly. No chafing, no moving around, zipper pockets fit my iPhone and all the extra pockets are so helpful to hold keys, gloves, ect. It took me a little bit of time to figure out how to fill the bladder but I watched a YouTube video and it cleared that up. The water doesn’t slosh around an excessive amount and stays pretty cool. I love this thing so much!!! Worth every dollar.