Nathan  VaporAir 4.0 8L Hydration Vest

[This review was collected as part of a promotion.] I've used lots of different running vests/belts/flasks in the past but this is my new go-to. It was comfortable on runs carrying as much as 3L of water + gels, phone, and food. It breathes surprisingly well despite the surface area it covers. The vest is wonderfully form-fitting and adjustable with the chest straps and elastic toggles.

I purchased this vest to prepare for and use during my half-marathon. The vest is very comfortable and was easy to set up and use with plenty of room for my gear.

I have tried to love the VaperAir 4.0 but can’t get comfortable in it. For almost 11 years I have run with the Vaper Wrap 2l hydration pack. It was amazing and the only reason I upgraded is a number of the zippers stopped working. I have over 100 miles in the VaperAir 4.0 and have found: 1. Followed measurements and ordered S/M which is a very snug. 2. Pack has multiple spots of friction - pouches in front rub chest with phone or collapsible water bottles, hydration bag in back rubs on left shoulder blade where the raised edge of the bladder lid is. Need more padding to reduce discomfort. 3. The pack bounces, if I tighten to reduce bouncing it squeezes my chest and I can’t breath. 4 don’t like the single color selections but overlooked that due to history with other pack 5. keys work their way out of front small pocket, have to place them in the zipped pocket or the water pocket to prevent loss 6. when taking off during a run it often tangles and takes time to straighten out. The older model was more robust and does not tangle. Positives: the bag is light, it allows you to carry a good amount of gels and drink powder. It does breath better than the old Vaper wrap.