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  • #00454712
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Includes 100 oz Reservoir

Includes 20 oz Bottle with Kicker Valve

Product Description

100 oz Reservoir included

Feature-rich and engineered to move with you, the Diablo is the perfect long-distance companion. Our SportVest shoulder harness system fits like a garment, balancing weight distribution, and resulting in a more comfortable fit. With a 100 oz reservoir and a 20 oz kicker bottle, there is ample capacity for liquid refreshment.

Specs & Details


  • 100 oz / 2.9L reservoir included
  • 20 oz / .6L bottle included
  • SportVest shoulder harness system
  • 3D AirMesh back panel and shoulder straps for optimal ventilation
  • Two front multi-use pockets attached to shoulder straps to maximize ventilation
  • Drain hole
  • Adjustable reflective bungee system
  • Shingled exit port for tube routing
  • HyperFlow bite valve
  • Strap secure webbing control
  • Adjustable sternum strap
  • Insulated HHS holster
  • Reflective piping & logo
  • All Ultimate Direction products are 100% BPA-Free


  • Separate top-loading reservoir pocket with reservoir hanger
  • Mesh storage pocket on back
  • Easy access side zipping front pocket
  • Top pocket allows for fast access to race passport


  • Weight: 1lb 10 oz / 737g
  • Height: 9 in / 22.9 cm
  • Length: 17.5 in / 44.5 cm
  • Depth: 6.5 in / 16.5 cm
  • Storage Capacity: 420 in3 / 7.1L
*Based on a horizontal orientation*

3D AirMesh, Nylon 210D Wide Dobby & Nylon Mesh

Overall Customer Rating:

4.333 Stars

(Based on 6 reviews)

Write a Review
  • 5 1 1386806400000
    Dale December 12, 2013 Yes No 1 found this review helpful

    This pack is very comfortable even when fully loaded. It provides enough space for me to throw in some emergency gear and carry excess water for remote trail runs. I tested it on a run last week where I strapped snowshoes to the back so I could run to the trail head and from there run 20k on new snow with my dog. The pack supported the weight of the snowshoes very well with little to no bounce. I also wore it for 4.5 hours on a mountain run in the ADKs and I found I could run with the front straps undone and it was still very stable and comfortable. Very pleased so far.

  • 5 0 1378512000000
    Daniel September 7, 2013 Yes No 0 found this review helpful

    After reading a few reviews online about the shoulder straps being a little narrow on the neck I was nervous. Especially when I tried it on and it didn't seem to be as wide as my other packs. However, it ended up being ridiculously comfortable. Went for a 6+ hour trail run, 20+ miles (I normally brag about the length of my runs so you know how awesome I am, but this time I'm bragging about the length of my run to brag about the pack) and it was awesome. Gu flasks fit perfectly in the front pockets (front pockets were the whole reason I chose this pack over any other, I hate having to take the pack off to get things like food, water, phone, camera) as well as a phone and camera. It fit the 100oz bladder (came with the new one by HydraPak, best bladder I've ever had) a jacket, 20oz coke, extra food, hat, gloves, emergency kit, and some gummy worms, with a little room to spare. With the 100oz bladder, 20oz coke, and 20oz bottle on the back I had plenty of liquid to get by on a hot September day. The pack was very adjustable, comfortable, and fit very well. I'm 5'10", 155lbs and it was great. Strong work UD!

  • 3 2 1364860800000
    Zaheer April 2, 2013 Yes No 2 found this review helpful

    Brilliant bag for every reason besides one very stupid flaw... the bottle at the back has a habit of falling out on the more hectic trails. I spoke to a UD sales person who says he uses this pack for cycling and experiences the same issue. He was happy to give me a 50% discount on my next purchase due to the inconvenience, provided I live in the USA, but as a South African resident that means very little. Come on guys, I expect better from you

  • 5 4 1344211200000
    David August 6, 2012 Yes No 4 found this review helpful

    This is such a great pack. Highly recommended. I am 6'5" and was worried about it riding too high but it is actually a good fit. All the straps are easily adjustable and the capacity is perfect. Having the extra bottle on the outside is really handy for a backup in case you get too low in the bladder or carrying a sports drink, using it as a filter bottle etc. Only downside was going through 2 leaky bladders (all replaced by UD) but they seemed to have solved that issue with the new design this year.

  • 4 2 1343088000000
    Scott July 24, 2012 Yes No 2 found this review helpful

    Great pack with just the right amount and location of storage. The bladder design could use some rethinking. I love this pack. I have used it for mountain bike riding and trail running. It is lightweight with very well thought out storage pockets. I love the 4 pockets on the front straps; these make accessing items during a run or ride effortless. The pack rides well on my 6 foot 185 lb. frame. The only improvements I can see would be a better top opening design for the bladder. It will tend to leak if you fill it to the top measurement mark. The only other change would be to do away with the white on the straps. Keeping them from showing dirt is a challenge.

  • 4 4 1338940800000
    Doug June 6, 2012 Yes No 4 found this review helpful

    PROS Bottle + Bladder, Bladder only, Bottle only. Carrying capacity of a day pack with vest pocket convenience. Vest system eliminates waist belt discomfort and much of the bounce associated with a regular pack. Everything that was missing on a popular competing vest product, specifcially space for gear and a roomier hydro sleeve. Hydration sleeve is extremely accessible and stable. CONS No key clip (easily remedied with a safety pin) The neck line is very tight across the shoulders and causes minor chaffing. Additionally, with a full bladder and/or gear in the main compartment, the shoulder straps are to short. This coupled with the tight span across the shoulders can cause a lot of annoyance over a long haul. I intend to cut out the haul loop to try and minimize these issues. OVERALL I'm sold on this pack and don't intend on replacing it anytime soon. Although I will be modding the shoulder/neck section. It holds all the gear I'm likely to need and have taken it on trail runs up to nine hours, in inclement weather without lack of space for the required gear. The inclusion of a bottle is important to me for several reasons. I use a steripen and the bottle is conveneient for sanitizing water within the sterpen capacity and transfering to the bladder. Its also nice to leave the bladder and just have the bottle when water sources are plentiful. And finally, having the additional capacity when no water is available really makes for plenty of options. I don't use the included bladder, because I'm very happy using a hybrid of two other manufacturers products. For the record though, the UD bladder is far and away better than those used by another popular racing vest with a horrendous on/off valve. I felt like I needed to have vice grips handy. Overall a sweet pack!