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A lightweight hybrid pack for ultra-runners.

Ditch the bouncing waist pack for the Mountain Hardwear Fluid Race VestPack, which carries the gear, fuel, and fluids you need for a long haul on the trail or pavement. The wide vest-style shoulder straps comfortably haul a hydration bladder, windbreaker, and snacks, and the mesh panels keep you cool and comfortable from mile one to 101.

  • HexWall mesh with Power Mesh panels
  • Stretchy, low-profile main compartment
  • Easy-access hydration sleeve with multiple ports
  • Quick-access shoulder strap pockets
  • Zippered internal security pocket
  • Wide shoulder straps with two chest straps
  • Reflective accents

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Here's what others have to say...

Unanswered Question

I am 6'1" 170lbs. My suit jacket size is 39 Long. I am lanky and thin but have broad shoulders. What size do I need? S/M or M/L? How should I exactly measure? Width across shoulder to shoulder or across armpit to armpit or across nipple line?


Nice Ultra Running Pack!

  • Familiarity:I've used it once or twice and have initial impressions

Familiarity: I've used it several times
Just did 21 miles with 5k feet of elevation gain. I had 2L hydration bladder and room for food, fold up rain coat and .7 Adventure Medical first aid kit. The two front pockets can hold the Hydrapak 500ML soft bottles with ease. I put my iPhone 5 in the other front pocket which worked out well. Little bounce and never felt heavy even though the pack probably weighed about 8 pounds at the start of the run. Also the pack never got too hot and didn't get any hot spots. For reference I'm coming from the old UD Wasp pack which I thought bounced way too much. Can fit almost the same amount of stuff as the old Wasp pack.

No bungee cord even though the loops are there.
No whistle
Some pockets are useless
No hydration bladder tube holder so have to buy a magnetic one from Hydrapak.
Straps could cinch tighter



Great Running/Biking Vest

  • Gender:Male
  • Familiarity:I've used it several times

This vest was purchased for a forthcoming adventure race and although I have not used it yet for that I wanted to give my first impressions. I have used this for mountain biking and trail running upto 2 hours duration. I have also used it between 40-90 Deg heat. So far I have nothing but awesome things to say about it, no chaffing, no bounce, little thermal heat stress and very customisable. I have purchased UltrAspire Collapsible 500ml Bottle/Straw for the front pockets which work really well for hydration on the move. All in all I think this is vastly under-rated and compared to Nathan/UltrAspire/Salomon products is amazing value.

Cannot reccomend it enough.

Does it come with a bladder and if so how big?

No bladder included. Can fit a 1.5L bladder easily in, much bigger is a little tight.


Volcanic 50k

  • Familiarity:I've put it through the wringer

Running was the poor man's sport until a few years ago. Now it's a fad and running events, shoes, and apparel are priced for the fashion minded yuppy. Fortunately, you have Mountain Hardwear which still makes moderately priced items like this race pack. It was one of the few that could be had for less that $100. I used it on a grueling 50k trail race that lasted 6+ hours instead of the usual 4 hours. Fits well, no bouncing around. I just don't understand why there are loops for a bungy system but no bungy system.