iRock 3

Size Guide

iRock 3 is made for technical trails, Obstacle Course Racing, and is built on a narrow last.

Grip and then some...

The iRock 3 is made for technical trails and obstacle course racing. It has the grip and control you need for the gnarliest of terrain.  

Our most aggressive, deep lugs give you the best grip in the worst conditions. This lower profile shoe gives you exceptional feel for the terrain. The upper is made of breathable sandwich mesh reinforced with strong kevlar fibers. It is built on a narrow last for a snug fit.  

The iRock 3 is superb for obstacle course racing, Swim Run (or Swim/run), Sky Running, VK’s, and trail running. 



  • Built on a narrow last 
  • Cushioning units in front and heel.
  • FitLock for mid sole stability 
  • Outsole is 100% Butyl-rubber. 
  • Strengthened rubber toe-cap
  • 7 mm lugs in outsole
  • 27mm/21mm stack height - total with lugs
  • 6 mm drop 
  • Weight (US 9): 8.8 oz (240 g)

Customer Reviews

Based on 20 reviews
Runs Small

I love the shoes! They are super comfortable to run in and they have amazing grip! The only issue is that they run extremely small. I normally wear a size 7 and had to order a size 8.5 for them to fit correctly.


Looking forward to try them out on the Montana Spartan Beast👍


I have the MAXx and thought I'd give these a try. I was a bit concerned from all I had read about them being a bit narrow. I went up a half size (as I did with the MAXx) and I cannot tell you how comfortable these shoes are... In fact as I was walking out of the Vegas Sprint last weekend I had that exact thought! Unbelievably comfortable, killer grip (duh) and they just performed perfectly. Highly recommend!

Holy grip

For starters, these are incredibly comfortable. The lower profile makes them feel like they are part of my feet. But the best part? The grip is INSANE. I live in central New York and am able to hit snowy trails with such ease. Even the crunchy, icy patches are no match for these. They make me wish the trails were snowy all year.

Fantastic OCR shoes

I ran an extremely muddy Spartan course, and the iRocks were phenomenal. The grip was reliable, the lugs helped propel me through the bogs and they helped me onto the podium.