Main Compartment and Access Rolltop
The main compartment is like a sack, and it closes in the roll-top style, first being pressed shut with Velcro and then rolled over like rolling up a carpet, until it is tight against the pack. At this point each end of the roll is clipped in to a strap that comes up each side. The strap is then pulled tight, cinching the whole thing vertically while the roll secures it horizontally. This is a very effective closure method, though it does take a few more seconds to do than a single zip would (such as is found on the Osprey Stratos and Talon series, for example). The strap on each side that cinches down the roll does create the only annoyance I have experienced with this pack – the long, dangling excess lengths of each side strap can whip around as you run, sometimes even coming round and lashing you in the front (possibly as punishment for the evil thoughts I have about car drivers…). You can’t trim them off—as Josh shows you how to do here in the ‘Pack Hacks’ series—because the extra length is needed on occasions when you fill the pack to full capacity. (See photos) What you can do is thread the excess strap into one of the daisy-chain loops on the front of the pack, which keeps them out of the way.
The main compartment itself is huge and empty, awaiting your clothes and lunch. If you don’t put anything in the main compartment, but do fill the front pockets with heavy items (such as full water bottles), you may find the front pulls forward/down, which can cause pressure on the back of your neck. This is an unlikely situation to be running in, however. I did this once, just for the experiment to see what would happen, but in the normal run of things it’s not a configuration most run commuters will want to try. If you do, for some reason, want to carry tons of water but nothing much else, it’s better for the weight distribution to put the bottles in the side pockets of the main compartment, behind and under your arms. This scenario is not fool-proof either, however…(see comment in ‘Sides’, below).
The back of the pack consists of a machine-knit fabric that is slightly thicker than t-shirt material, overlaying a nylon or other material than can just barely by glimpsed underneath.
There are no seams on this back panel, making it very smooth against the back. The whole back panel as well as the backing on both over-the-shoulder and down the chest vest flaps is a single piece of material. There are no seams or joins anywhere where the pack touches the wearer, except for where the yellow material meets the soft grey edging material. This trimming material is also soft. The pack did not cause any chafing on my back at all, ever.
Inside the main compartment of the pack is a Velcro-closed compartment that holds a foam pad cut into the shape of the back of the pack, and which gives the pack a firm, stable, back padding. This foam pad is smooth foam on the side that faces into the pack. On the side that sits against the wearer’s back, the foam pad has many little nipple-bumps all over it, for massage-style comfort. This pad can be taken out of the pack and used to sleep on etc when you’re doing a stage-race in the Sahara Desert, or when you get tired on the way home from work and want to take a quick nap in the park.
The Fastpack 20L does not come with a bladder or bottles, but hydration compatibility is one of its design priorities. There is a dedicated hydration bladder sleeve inside the main compartment. Immediately above this is a Velcro ‘hook’ for hanging the bladder from (so it doesn’t slump down into the sleeve). Above this, in the center of the top of the pack, underneath the grab-handle, is the hole for the bladder hose. There are two elastic/nylon strips on each vest flap near your clavicle bone for the hose to route through. Then there are two large mesh pockets on either side of the pack, as mentioned above, for water bottles. Finally (sort of), there is a pull-cord-closing bottle pocket on the left vest strap. If all this still didn’t give you enough storage for fluids, there is also the zip-closing pocket on the right vest strap, which can be opened wide enough to hold a 600ml bottle if necessary.
Above: An example of the amount of liquid you can carry in the UD Fastpack when simply using the designated pockets: 2L bladder, 3 x 750ml bottles, 1 x 420ml softflask. Of course, if you wanted to, you could also put a mini-keg in the main compartment….
So, how does the UD Fastpack 20L perform as a daily pack for run commuters? The answer is: extremely well…. For some, this will be the perfect run commute pack and, like the OMM 20L pack, the only pack they’ll need for both the daily run commute and the Marathon des Sables or the 4 Deserts adventure races!