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Item # PAT00P4

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Item # PAT00P4

If you're not first, you're carrying too much.

Trail runners and speed hikers know the important of going light, but too often comfort gets overlooked;—not with Patagonia's Fore Runner 10L Vest, which weighs just 11oz but is designed to avoid the rubber, bouncing, and jangling that'll drive you crazy on a 30 miler. The nylon ripstop fabric is coated with both polyurethane and a DWR coating, so it will repel water and not get heavier, and the foam back panel is made from comfortable and breathable mono mesh to help you stay cool. Of course, the point of the Fore Runner is to carry stuff, so it has a main top-loading compartment, stretch bottle pockets, and multiple stash pockets to hold energy gels, sunscreen, and other small but essential items. There's also a hydration reservoir for easy drinking, and the whole package is locked down with compression straps to prevent the bouncing that will make you go nuts on extra-long runs and fast hikes.

  • Nylon ripstop
  • PU coating and DWR treatment
  • Foam back panel with mono mesh
  • Top-loading main compartment
  • BPA-free 2L hydration reservoir
  • Strech bottle pockets
  • Gel and stash pockets

Tech Specs

100% ripstop nylon (100D face / 210D bottom), PU coating, DWR treatment
610 cu in
foam back panel
Shoulder Straps:
Air Flow mesh
Hydration Compatible:
Reservoir Included:
yes, 2L, with quick connect
2 front stretch, 1 gel, 1 stash, 1 main
Claimed Weight:
11 oz
Recommended Use:
trail running, hiking
Manufacturer Warranty:

Size chart


 SLOne Size
Torso 16 - 19in
(40.6 - 48.3cm)
19 - 22in
(48.3 - 55.9cm)
17 - 20in
(43.2 - 50.8cm)
Waist 28 - 36in
(71.1 - 91.4cm)
32 - 42in
(81.3 - 106.7cm)
26 - 42in
(66 - 106.7cm)
How to Measure:
-Have a friend locate the bony bump at the base of your neck, where the slope of your shoulder meets your neck. This is your 7th cervical vertebra (C7). Tilt your head forward to locate it more easily. This is the top of your torso length.
-Place your hands on top of your hips bones, with fingers point forward, thumbs in back. This it eh "shelf" on which your pack will rest. The middle of an imaginary line drawn between your thumbs is the bottom of your torso length.
-Using the tape measure, your friend should measure the distance between the C7 and the imaginary line between your thumbs. Be sure you stand up straight when being measured. You know should have your torso length.
Measure around your waist just above your hips.

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Hi Guys,

I cant tell what the sizing difference is between S/M and L/XL. I am 6', athletic build 185 lbs.



Best Answer

Hey Brad - I would recommend you go with the L/XL in this Fore Runner Vest. The sizing is based on torso length and the L/XL is for 19 - 22 in torsos. Feel free to contact me directly with any additional questions.

- Kyle L. - Expert Gearhead

Will this keep the contents dry in the rain?

Hey Conor,

The fabric does have a water-resistant treatment, but after any extended period in a decent rain it will wet through. You could try getting a pack cover or using aftermarket fabric treatments to boost the waterproof-ability but not add (much) weight!

new favorite riding pack

    I had written this pack off as just a running piece at first, and didn't think a pack with no waist straps would do well mountain biking until a buddy of mine started riding with one and raving about it.

    This is my new favorite riding pack, and one of the most comfortable I've used. The chest straps have two ways to tighten down, and the packs sits really well even over bumpy terrain. Not having a waist strap is actually a great thing, and makes the pack super comfortable.

    I've always liked packs with front pockets on the waist straps, but the pockets on the main straps here are even sweeter. Plenty of room for gels, chewies and bars, and super easy access whether you're on or off the bike.

    It is still designed as a running pack so the interior has just a hydration bladder pouch and the rest of the pack is open. A little tough for a biker to get used to since there's no dedicated tools, a pump, or co2, but I got used to it pretty quick. Finally the exterior stretchy pocket is great for food or an extra layer and actually holds everything pretty well despite not having a secure closure at the top.

    I understand that the pack ships with a 2 liter bladder, however, will the pouch also accommodate a 3 liter bladder?


    I think it could be done, but it might not be ideal. I just put an Osprey 3 liter bladder in mine and it fits in the pack, and seems to work since the bladders has a rigid back. Not sure how a camelbak or similar bladder might do without any support since it extends above the top of the bladder pocket in the pack.

    Unanswered Question

    Trying to decide between this pack and the Ultimate Direction Wasp for long distance trail runs and speed hiking. Which pack is lighter? Are the bladders included in the "claimed weight"? Are the bladders included in the "total volume"? or are they seperate? Spec numbers don't always tell the whole story! Thanks!


      I tried to use mine for the first time and found out the water bladder had a hole in it. I didn't even get to use it.

      Definitely get in touch with Backcountry or Patagonia's customer service for a replacement. Patagonia's # is 800-638-6464

      good product

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

      nice snug fit to the body with very little bounce. Living in New Hampshire with our wet spring/fall weather im a little concerned with the top loading drawstring closure.My cell phone fit nicely in the zippered storage pocket on the front.Stretchy pockets each held a 10oz water bottle.First time out with this vest i put in 14 miles of trail/dirt road.

      Good overall but could improve

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

      Overall the pack has nice adjustment. It sits close to the body and doesn't bounce, barely know it is there once it is on. The bladder is easy to fill and clean. I would say this pack is good for medium to long runs or for lightweight hiking where time isn't an issue.

      The lower pockets on the front are good for holding bars or gels but not much else. I did have my phone in there with the elastic tight so it wouldn't come out. Not much can fit in the zippered pocket. Also the key pocket in the back has a clip for a key, but the key will not fit in the pocket (maybe it isn't suppose to).