Sale: $ MSRP: $

The Montrail FluidFlex II is a versatile, performance trail running shoe designed for a neutral foot motion.



Lace up the Montrail FluidFlex II and enjoy a natural run without sacrificing a soft and cushioned ride. This neutral shoe features a flexible, low profile platform, encouraging a forward footstrike and a smooth transition. A FluidFoam midsole provides high mileage protection, while micro lugs on the outsole make this shoe ideal for both paved surfaces and well-groomed trails.

Model Number:

Weight:  8.0 oz (size 9)

Stack Height: Heel (22mm), Forefoot (17mm)

Widths Available: D=Medium

How It Fits (based on width D)

  • Sizing: Standard running shoe length
  • Heel: Medium  to narrow
  • Mid-foot: Medium
  • Forefoot: Medium to narrow
  • Toe-Box height: Medium
  • Arch Structure: Medium
  • Shoe Shape: Semi- Curved
  • FluidFoam is a full length compression molded foam that offers high energy impact absorption and increased durability.
  • Articulated Midsole Flex Grooves run horizontally and vertically through the midsole for increased flexibility and support.
  • Gryptonite Trail is a sticky outsole rubber designed for optimal traction and durability on both wet and dry surfaces.
  • Micro 3 Point Lug design is lightweight and provides multi-directional grip on trails.
  • Flex Grooves run horizontally and vertically through the outsole for increased flexibility.
  • Open Mesh throughout the upper offers lightweight breathability.
  • Lightweight overlays offer a flexible, supportive fit and high breathability.
  • Asymmetrical Lacing adapts to the foot to reduce hotspots.
  • Anatomical Fit mimics the shape of the foot, resulting in a glove-like feel and allowing the the foot to work as a single unit.
  • Traditional Sockliner adds underfoot comfort.
  • Strobel Last with the upper stitched to full length fabric for a comfortable underfoot feel.

Footwear Performance Characteristics

Pronation Control: What's This?

  • Neutral
    • Min
    • Mod
  • Support
    • Min
    • Mod
    • Max
  • Motion Control
    • Mod
    • Max

Heel-Toe Offset (mm): What's This?

  • 0
  • 1-2
  • 3-4
  • 5-6
  • 7-8
  • 9-10
  • 11+

Stack Height:

  • Barefoot
  • Minimal
  • Low
  • Medium
  • High
  • Maximal


  • Road
  • Road-Trail
  • Hard Trail
  • Varied Trail
  • Soft Trail

Shoe Type:

  • Premium
  • Standard
  • Performance
  • Racing

Customer Reviews

Comments: This is my second FluidFlex after wearing out a Version I. All the stuff I liked in the initial offering remains in Version II (lightweight/flexible/modest drop). In fact, I would say the mid and outsoles are identical. The original had an odd upper design that pressed on my big toes which was removed in the II. I appreciate the wider laces and more conventional lace pattern on the update as well. One notable difference is the II is a bit longer and wider than the I in the exact same size (9 in my case). This is not a high traction (mud or sand) trail shoe. It does well in all my offroad activities--groomed trails, gravel, moderate rock&root. I'd buy it again.
From: Bryan, OR, USA. September 11th 2014

Comments: Not good, sorry for the negative comments, but I tried this shoe on several training runs prior to running a 100 a few weeks back. The shoe felt good, however I received the biggest blister on the bottom of my foot, never had one like that after 27 hundred milers. After about 150 miles, the shoe fell apart. I had a blow out on Sunday with my foot exiting the shoe. Poor construction and they should really improve on that. I am not sure if they do any field testing, but if not, they should. Thanks
From: John, Magnolia, TX, USA. August 18th 2014

Comments: I picked up the FluidFlex II with a coupon given to me at a race by the Montrail rep. This is one of the only shoes I did not initially order from running warehouse. I have run quite a few trail miles in the shoe. It works well in mud, rocks, roots, and pretty much any terrain I have experienced. Drainage of water is fine, too. I find good cushioning but still feel the ground fine. I will probably run my next 100 mile race with these shoes. Low drop and good cushioning are a good combo for me.
From: Burke, Greensburg, LA, USA. July 2nd 2014