Brooks PureFlow 5 Review

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I liked the Brooks PureFlow 3 enough to give it a "recommended" rating, so I looked forward to the fifth version. Sadly, while Brooks have made a few improvements they've also made some significant mistakes. The biggest problem I found with the PureFlow 5 is that it's one of the more uncomfortable shoes I've worn recently. There's the poorly designed tongue that dug into the crook of my ankle, the odd cushioning, the stiff upper, the heel counter that's intrusive, all adding up to a shoe that I dislike putting on. Like the previous version, I found the PureFlow 5 to have less cushioning than I expected given its weight. You can get the same cushioning with less weight or the same weight with more cushioning, and either would be better. The flexible sole is nice, but has the downside of being a magnet for stones that get trapped and have to be removed. This review has taken me a long time to write as I put off running in it until I finally forced myself. Overall, I was torn between waiting this shoe as "not recommended" or being a little generous and saying that it's "worth considering." In the end I felt that the PureFlow 5 is just about "worth considering", but it was close. (I use The Science of Running Shoes as the basis of how I test running shoes and what you should look for in a running shoe.)

Brooks PureFlow 5 top
Brooks PureFlow 5 outside
Brooks PureFlow 5 bottom
Brooks PureFlow 5 inside

1 Characteristics

  • Cushioning . The PureFlow is reasonably cushioned, but it can feel a little odd and overly firm occasionally. This might be because the midsole contains Brooks "DNA" which contains a non-Newtonian fluid. Without going into too much science, this means that the midsole is softer when you landed gently, but harder if you land harder. To my mind, this seems to be the exact opposite of what you'd want. If you have a misstep and land a little harder, the shoe will compound the error and make your landing even more punishing. The other concern is that you can get the same cushioning with less weight or the same weight with much better cushioning.
  • Drop. The PureFlow has 5mm of drop, which is a little more than I'd like, but not enough to cause me problems.
  • Structure. The PureFlow doesn't have much in the way of structure that would interfere with your natural biomechanics. The area under the arch is only slightly raised, which could put pressure on the arch and cause problems as arches are strong when loaded from above, but can be broken easily by pressure from below. The heel of the PureFlow is more rounded than most traditional shoes, which is a good thing. There is little if any of the "snowshoe" affect that can create excessive torsional (twisting) forces.
  • Flexibility. The PureFlow is nicely flexible due to the midsole groves and the gaps in the outsole.
  • Outsole. The hard rubber outsole covers most of the underside of the shoe, with just a bit of exposed foam under the arch of the foot. This outsole improves longevity and grip, but adds to the weight. As you can see from the pictures, the outsole is in patches which help keep the shoe flexible. I found that the gaps in the sole were something of a stone trap, and even small patches of gravel meant I sometimes had to stop and pick the stones out.
  • Shape. The PureFlow, like most running shoes, has a toe box that is not designed for humans. I recommend you cut open the toe box open to prevent toe problems. (I recommend cutting open the toe box of virtually all running shoes, with the exception of a few shoes like some Altra shoes. When you have some worn out shoes, you should try cutting open the toe box. I've found that it's a big improvement, allowing my toes to move naturally and engage for toe off, as well as reducing the possibility of blisters.)
  • Upper. The upper is inflexible and quite thick, but mostly seamless. I found it's not very breathable, nor as comfortable as I'd expect, mostly because the material is rather stiff. Thankfully Books have not included their "Nav Band" from previous versions, which was a poor bit of design. There is a reasonable amount of cushioning around the ankle opening, but not enough to offset the overly stiff heel counter (see below).
  • Tongue. The PureFlow tongue is a real weak point in this shoe. The tongue is nicely padded and stiff so it's unlikely even the most sensitive runner would be able to feel the laces pressing on the top of their foot. However, this stiffness means that the top edge of the tongue dug into the crook of my ankle and caused me problems that limited how far I could run in the shoe.
  • Lacing. The laces are slightly round, but stayed tied without a problem.
  • Heel Counter. The heel counter is large and solid, adding to the overall discomfort. Mostly the heal counter in a shoe is isolated enough by padding to be harmless, but with the PureFlow 5 it was slightly noticeable. If you twist your angle, I think the PureFlow heel counter would dig in and make things worse.
helping-hand.jpg

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2 Cushioning and Shoes

It's intuitively obvious that the cushioning in a shoe will reduce the impact on your body when running. However, The Science of Running Shoes indicates that the reality is rather more complex. While slight cushioning may reduce the effort needed to run by improving your Running Economy, most scientific research indicates that more cushioning does further improve Running Economy. In addition, cushioning does not generally reduce impact and may actually increase it. This is counterintuitive, but is likely to be due to the way a runners mind and body adapts to softer cushioning. Unfortunately, the scientific evidence is far from complete and it's hard to give clear recommendations. I believe that some runners will prefer more cushioning, while others prefer less, and typically those running further have a fondness for greater cushioning. I also believe that a shoe should be as light as possible, and a shoe should justify its weight with the cushioning it provides. My advice is to decide what level of cushioning you're looking for, and then find the lightest shoes that also fit well and are comfortable.

3 Visualizing the Attributes of the Brooks PureFlow

How Brooks PureFlow compares showing rearfoot cushioning against the performance penalty of its weight. Upper right is better.
How Brooks PureFlow compares showing forefoot cushioning against the performance penalty of its weight. Upper right is better.
How Brooks PureFlow compares showing the price against the benefit (cushioning/performance penalty). Upper left is better.
How Brooks PureFlow compares showing the loaded drop against the benefit (cushioning/performance penalty). Upper left is better.

4 A Comparison with other Recommended Shoes

For a more detailed comparison of these shoes see the Recommendations for Best Running Shoes. This table lists the key attributes of What to Look for in Running Shoes. For more detailed information, on the shoes see detailed shoe comparison.

Full Review Name Rating Recommended
price
Benefit Weight
(oz)
Penalty
(sec/mile)
Forefoot
Thickness
Heel
Thickness
Loaded Drop
mm
Cushioning Flexibility
Asics 33-DFA Review 33-DFA Worth considering $90 5.7 10.6 16.5 27 27 0 6.1 6
Saucony Type A6 Review A6 Highly Recommended $100 8.2 6.1 9.5 17 21 4 5.0 8
Adidas Adios Boost 2 Review Adios Worth considering $140 4.7 8.6 13.4 17 27 11 4.0 7
Skechers GO Bionic 2 Review Bionic Highly Recommended $95 6.4 7.0 10.9 15 18 2 4.5 9
Hoka Bondi Review Bondi Highly Recommended $150 8.0 10.9 17.0 41 45 5 8.8 0
Hoka Clayton Review Clayton Best of the Best $150 8.8 8.3 12.9 26 30 3 7.3 5
Hoka Clifton 3 Review Clifton3 Best of the Best $130 9.1 9.8 15.3 34 38 3 8.9 6
On Cloudracer Review Cloudracer Worth considering $130 5.7 8.2 12.8 19 27 5 4.7 8
Hoka Conquest Review Conquest Worth considering $170 5.0 11.9 18.5 28 34 5 6.0 3
Saucony Cortana 4 Review Cortana Worth considering $150 4.4 9.9 18.7 22 28 5 4.3 5
Mizuno Wave Cruise Review Cruise Worth considering $120 6.6 5.9 12.5 17 20 7 3.9 7
Newton Distance IV Review Distance Worth considering $155 7.5 9.1 14.2 26 31 3 6.8 6
Asics Gel DS Racer 10 Review DS Racer Worth considering $110 8.2 7.0 10.9 21 26 6 5.8 6
Mizuno Wave Ekiden 8 Review Ekiden Worth considering $115 5.7 5.7 14.6 13 18 6 3.2 8
Saucony Endorphin Review Endorphin Highly Recommended $125 11.1 4.1 6.4 14 13 -1 4.5 9
Adidas Energy Boost Review Energy Worth considering $160 7.2 10.0 15.6 20 30 7 7.2 6
Puma Faas 100 R Review Faas 100 Highly Recommended $90 8.4 6.1 9.4 15 20 1 5.1 9
Saucony Fastwitch Review Fastwitch Highly Recommended $90 9.5 7.1 11.1 20 22 4 6.8 8
Topo Fli-Lyte Review Fli-Lyte Highly Recommended $100 6.0 9.4 14.6 23 24 4 5.6 6
Nike Free 4.0 Review Free Recommended $120 5.3 8.2 13.6 24 30 6 4.4 6
Saucony Freedom Review Freedom Recommended $160 5.4 10.7 16.6 11 11 3 5.8 7
Asics Gel Lyte 33 3 Review Gel Lyte Not recommended $90 8.0 7.3 11.4 17 24 4 5.8 9
Skechers GOmeb Speed 3 Review GOmeb 3 Worth considering $120 6.9 8.1 12.6 20 24 4 5.5 8
Skechers GORun 4 Review GORun Not recommended $100 6.1 7.5 11.7 15 23 3 4.5 7
Skechers GOrun Ultra 2 Review GRU Worth considering $90 7.5 10.0 15.6 28 34 8 7.5 5
Skechers GOrun Ultra Road Review GRU-R Worth considering $105 6.5 11.3 17.6 30 40 6 7.4 7
Asics GT 2000 Review GT 2000 Not recommended $120 4.8 11.2 17.4 28 35 5 5.4 4
Asics Gel Hyper Speed 7 Review Hyper Speed Highly Recommended $75 10.9 6.3 9.8 22 26 5 6.8 7
Altra Instinct 3.5 Review Instinct 3.5 Recommended $115 4.9 9.3 15.2 24 23 0 4.5 6
Asics Tarther Kainos 3 Review Kainos Worth considering $130 10.0 6.9 10.7 17 27 9 6.8 7
Saucony Kinvara 7 Review Kinvara Best of the Best $110 7.4 8.2 12.8 23 27 3 6.1 6
Nike LunaRacer 4 Review LunaRacer Recommended $90 9.9 7.0 10.9 22 30 7 6.9 6
Nike LunarSpider R5 Review LunarSpider Recommended $125 6.9 6.7 10.4 17 21 3 4.6 7
Hoka Mafate Speed Review Mafate Best of the Best $170 7.6 11.9 18.5 39 40 4 9.0 3
Pearl Izumi EM Road N0 v2 Review N0 Highly Recommended $100 7.9 6.5 10.1 14 20 4 5.2 8
New Balance 980 Review NB 980 Worth considering $110 4.6 10.1 15.7 21 30 5 4.6 5
Hoka Odyssey Review Odyssey Highly Recommended $130 8.5 9.4 14.6 37 45 5 8.0 4
Altra Olympus Review Olympus Highly Recommended $130 5.4 11.8 18.4 27 27 3 6.4 4
Altra One 2.5 Review One Highly Recommended $100 8.5 7.1 11.1 22 25 2 6.0 8
Altra Paradigm Review Paradigm Highly Recommended $130 6.4 9.9 15.4 25 25 1 6.4 4
Asics Piranha SP 5 Review Piranha Recommended $100 10.1 4.2 6.5 11 15 3 4.2 9
Brooks PureFlow 5 Review PureFlow Worth considering $110 6.0 9.7 15.1 26 29 5 5.8 8
Salming Race Review Race Worth considering $130 6.9 6.5 10.1 16 19 4 4.5 7
New Balance RC1600 v2 Review RC1600 Highly Recommended $110 8.8 5.6 8.7 15 21 5 4.9 8
New Balance RC5000 Review RC5000 Best of the Best $125 12.2 3.4 5.3 13 17 3 4.2 8
New Balance RC5000v2 Review RC5000v2 Best of the Best $125 14.2 4.0 6.2 13 21 6 5.7 8
Skechers GoRun Ride 3 Review Ride Worth considering $85 5.9 8.5 13.2 18 28 6 5.0 9
Inov-8 RoadXTreme 220 Review RXT-220 Worth considering $120 5.2 8.0 18.2 14 17 3 4.2 9
Hoka Stinson Lite Review Stinson Highly Recommended $160 7.3 11.6 18.1 35 40 6 8.5 2
Nike Zoom Streak LT 3 Review Streak LT Best of the Best $80 8.8 5.4 8.4 16 21 4 4.8 6
Adidas Takumi Sen 3 Review Takumi Sen 3 Highly Recommended $160 7.7 6.6 10.2 17 21 4 5.1 6
Altra Torin 2.0 Review Torin Worth considering $125 5.8 9.6 14.9 28 25 -1 5.5 5
Hoka Tracer Review Tracer Recommended $130 7.2 7.4 11.5 21 24 2 5.3 6
Merrell Trail Glove 3 Review Trail Glove Best of the Best $100 2.9 6.9 24.7 11 11 0 2.0 9
Brooks Transcend 2 Review Transcend Recommended $170 5.1 12.6 19.6 30 36 6 6.5 4
Topo Tribute Review Tribute Recommended $100 5.9 7.3 11.4 20 18 -1 4.3 7
Mizuno Wave Universe 5 Review Universe Highly Recommended $125 10.7 3.1 10.6 9 12 1 3.3 9
Merrell Vapor Glove 2 Review Vapor Glove Highly Recommended $85 2.1 6.1 27.6 6 5 0 1.3 10
New Balance Vazee Pace Review Vazee Pace Worth considering $110 6.0 8.6 13.4 18 24 6 5.2 6
Asics TartherZeal 3 Review Zeal Worth considering $140 10.9 6.3 9.8 17 27 9 6.8 7

It's not a running shoe, but I love the Hoka Tor Ultra hiking boot and I've tested the Altra Lone Peak Boot.
Older shoe reviews: Saucony Hattori Review, Mizuno Cursoris Review, Skechers GO Bionic 2 Review, Hoka Clifton Review, Saucony Virrata 2 Review, Brooks PureCadence 3 Review, Brooks PureConnect 3 Review, Brooks PureFlow 3 Review.
Reviews of shoes that are not worth including on the table: Hoka Huaka Review, Patagonia EVERlong Review.