In the past, I had an interesting experience with the Montrail FluidFeel running shoe, as it looked like one type of shoe (heavy and bulky) but ran like another type (light and nimble). So I was interested to see if this would be the case with Montrail’s FluidFlex model. Read on to see the verdict.
I came across the FluidFlex at Fleet Feet in Davis, California. The shoe has a surprisingly racing flat-like look for a trail running shoe, but then it weighs only 7.6 ounces – it’s quite light. And it looks bold in coal with red Montrail side lettering and a yellow midsole. I wound up buying the FluidFlex hoping that the shoe might prove to be as light, fast, and flexible as it appears to be.
I can say right off that the FluidFlex offers great cushioning in a lightweight shoe. It’s nice to walk in and only the asymmetrical lacing system lets others guess that this is not a racing flat. The fit is narrow and secure but not tight because of the highly flexible upper. The fit at the rear of the shoe is exemplary; one’s heels and ankles are well surrounded and protected.
The FluidFlex fosters such a smooth ride stride while running that I began to think of it as the Montrail Glide Runner. The shoe has a floating sock liner which adds to its uniqueness. On the road, the shoe’s high level of flexibility allows the feet to go through the proper landing cycle: heel, then mid-foot, then forefoot. The shoe does not interfere with one’s normal foot strike, and allows the feet to land flat.
The feel of the FluidFlex on roads and trails is quite similar to the Pearl Izumi E:Motion Road N1 and the La Sportiva Helios. On asphalt, it simply feels good to run in.
On a track, the FluidFlex makes one feel like Steve Prefontaine, possessing the ability to put in some strong, fast laps. The heel padding is soft but the landing is secure and anything but mushy. The fast and steady nature of the shoe is maintained on a crushed gravel trail.
The FluidFlex has a flared sole that supports and reinforces a high level of lateral stability on a hard-packed dirt trail. The hybrid nature of the “town and country” sole underfoot provides just enough grip on a hard-rock trail to keep one traveling straight ahead rather than slipping and sliding. The sole also allows the feet to move sideways while in motion. It may seem counter-intuitive but this provides a reassuring measure of stability control.
The FluidFlex feels low to the ground and it has a minimalistic 4mm heel drop. For some runners (especially long-term heel strikers), this will signal the need to break in the shoe slowly and carefully. In my case, I initially experienced some soreness in my calves and stinging in my heels. But this was only temporary.
The Montrail FluidFlex lives up to its name, providing fluid flexibility in a shoe that’s more protective than its looks would indicate. While it may be a lightweight shoe, it’s quite durable in use. My well-used pair has minimal signs of wear on its still vibrant yellow sole.
The FluidFlex is a WYSIWYG trail running shoe. It is the shoe it appears to be and more.
Runners, whether fast or slow, should be able to use this shoe as a trainer on a wide variety of surfaces. It will serve as a good marathon trainer and race day shoe for some competitors and as a fine 5K to half-marathon shoe for many. Joggers with inflexible feet and runners fast enough to chase cheetahs will benefit from the shoe’s ultra-flexible, blown-rubber cushioned forefoot.
The FluidFlex is an excellent trainer to run in even if you never go near a natural trail.