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Men's Boss Runner - X521M

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Product Description

  • X last for superior motion control
  • 2 removable layers provide fitting flexibility
  • Mozaic® pressure relief layer for customized comfort
  • Carboplast® footbridge for motion control & stability 
  • Strategically placed flex grooves for traction during gait cycle
  • Open air sandwich mesh upper for breathability


0.75 LBS
Calculated at checkout

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Product Reviews

  1. Must have had the tag mislabeled 1 Star Review

    Posted by on 30th Sep 2015

    I had to return this product to Apex We have ordered this product in the past and have never had this problem. I had to return the shoe due tot he fact that the size did not fit and the width was too tight.. It was too short and too tight on my foot. I have always ordered the same size, but this was must have been incorrectly tagged. We returned the product and will probably reorder and hope this does not happen again.

  2. Good Fit 5 Star Review

    Posted by on 31st Jul 2015

    I've hade Apex shoes before and liked them ... with the exception of the adjustable heal Rhino Runner - more on that later. The shoe is comfortable and very cool to wear hence it is my summer go-to shoe.

    I purchased the Rhinos about a year ago and found the adjustable Velcro strap on the heal was more of a hinderance that a support item so I cut it off and used a nylon electrical strap in in its place. Bottom line ... no more adjustable heal straps!