UltraspireZygos Unisex Lighweight Hydration Ultra Running Pack - 14 Liter and 12 Pockets Running Vest

I have been ultra running for years and have always been loyal to the Salomon Skin Set 12L packs. But I recently ran a mountain 100M that had a ton of required gear and very long, unsupported stretches. I couldn't fit everything in the 12L so with the recommendation of a fellow racer, I upsized to this pack. Now its the only thing I want to wear. I'm small framed and was able to adjust this to 0-bounce, no chafing, and nicely distributed weight. The pockets are intuitive so it's easy to stash what you need where you need it. And the straps on the back work nicely as bungees if you want to loop a wet jacket or puffy through them. The pole holders keep the poles off your back and in place. And all the secret pockets add a nice touch - I'm thinking specifically of the protected phone pocket, and the extra pockets I use for trash in the side food pouches. Only complaint: The foil insulation lining in the bladder compartment ripped out of my blue one on the second use. I sent it back to Ultraspire and exchanged it for a new one. The foil lining ripped out of that one on the first use. It's an unnecessary feature, but it was a bit frustrating. I have talked to others with this pack and it's 50/50 whether the lining survived. Since everything else about the pack is above-par, I'd highly recommend it. It's now my go-to piece for adventure running.

Absolutely love all the storage & the fit. Really great for long runs. Ordered a second one for my wife.

I purchased theUltraspire Zygos 2.0 as a replacement for my aging Camelbak ultra pro. So far I’ve only ran about 75 miles with the pack. The Zygos 2.0 fits great ( I’m 5’8” 155lbs pack size medium) no bouncing or rub spots. Front and side pockets are great and easily reachable. Bottles are easy to get in and out of the front holders. Plenty of room to store gear for long runs and ultras with long distances between aid stations. Zippers pulls take a little getting used to, but work well. Only thing I wasn’t impressed with is the 2 liter reservoir that comes with the pack. It works fine, but I like the bite valve on the Camelbak much better. It also seams to be a bit hotter to wear than the Ultrapro. The Zygos 2.0 seems to be well built extremely well and should last for a very long time. Great pack for the money.

This vest is perfect for those of us who want to take all the things on hikes or runs. Like I might need a separate pocket for my keys than from my chews or my chapstick. I need a pocket I can easily access for putting my phone in and out quickly.

Bought this vest for the Grand Canyon. The morning I set out to run across the Grand Canyon Rim 2 Rim 2 Rim, I filled up the 2.0 liter. It immediately leaked out the bottom. From the seam. I had to use a backup bladder that was 1.5 liter. Luckily I survived despite the July 1st heat in the Canyon. It was 115 degrees at Phantom Ranch that day. I then jumped on a plane and flew to Morzine to compete in the Ultra World Spartan championship. When I returned home, I sought the ability through Amazon to get a replacement bladder with no idea how. There is no way to contact the seller which says it is Ultraspire. I love the vest, just want a bladder that doesn’t leak. Will give a 5 star if I had a bladder that could hold water.

It is a very nice Zach and he is very active in racing.

This hydration pack is worth the $$!!! It has pockets galore and everything fits inside comfortably and doesn't shift around or bounce while running. I absolutely glad I spent the extra money and purchased this!

Decent pack for 100milers. The pros are great pockets to hold your nutrition and gloves/hats; plenty of storage to go the distance; durable pack vs the Salomon packs. The cons is the front bottle pockets are too big for other brands such as Salomon/Ultimate Direction soft flasks. It’s best for plastic bottles vs the collapsible bottles. Another con is the sizing is off: my chest size is 41/42 inches thus a large pack however I can pull both sides of the vest and meets each other….. I would go with a medium; and the last con is the fastenings gets loose within a hour of running and then have to adjust and tighten again. I wouldn’t but again.