YinYang Training Bundle

  • Sale
  • $180.00
  • Regular price $238.95

The perfect bundle for new runners & experienced runners alike! Designed to make your feet more comfortable than they've ever been before. This bundle includes: 

  • One pair of Yin Yang R/T Trainers
  • One customizable AI orthotic insole kit
  • One pair of buttery soft socks



Whether you're hitting the roads, trails, running long distance, or race pace, our YinYang trainers offer you the cushioning and responsiveness you need for a fun, fast run.

Local artist Cody Abshire from Boulder, CO captures the balance of running with this custom logo.

SIZING NOTE: Women's sizes 6-9 run a half size small. We recommend going up a half size from your normal running shoe size. Men's 11.5-13 are running a half size big.  We recommend going down a half size.  

If you are unsure of your size, reach out to us for assistance! 


  • Lightweight, breathable mesh
  • Conforming seamless construction
  • Welded midfoot stability straps
  • Lightweight heel counter
  • Flat stretch lace & elastic tongue stabilizer


  • Firm yet responsive midsole foam formula
  • Designed to enhance shock absorption for a stable cushioned ride
  • Internal forefoot & rearfoot dual density pods provide cushioning and protection
  • Extra layer of high density responsive foam directly under the sockliner offers added protection and cushioning against road or trail impact


  • High rebound sticky rubber compound with a unique tread pattern creates amazing cushioning on the roads & traction on the trails
  • Midfoot stabilizer protects and stabilizes the foot for a more balanced run


  • Contoured removable sockliner
  • High resilient foam for long-lasting cushioning
  • Removable to accommodate custom orthotics.



    Just pop your Boulder runners in the washing machine on a quick, gentle, cold cycle. Use a mild detergent and let them air-dry.  Any super dirty spots can be hand washed with a soft brush or old toothbrush.  



    Please Note: Each AI Sole System kit comes with one pair of insoles with customizable parts, one for each foot.

    This innovative performance insole features adaptable, modular wedges that allow you to personally customize your footbed to match your individual walking or running style. No matter what you're doing on two feet, the AI Sole System will help you perform at a higher level with maximum comfort, greater balance, and improved efficiency.

    Just peel and stick the parts to balance your feet!

    • TOPCOVER: Anti-microbial, anti friction topcover. No stinky insoles. No hot spots.
    • FOAM: Highly resilient EVA foam for maximum shock absorption. Anti-microbial and recyclable.
    • DUAL DENSITY PLATES: Firm foam to add stability, cradling in the heel, protection to the ball of the foot.
    • MODULAR WEDGES: Designed to peel & stick to add support and balance in your rearfoot and forefoot. Forefoot 5 finger wedge is designed to cut to customize the forefoot support your foot needs. Cut, peel, & stick!


    We have helpful videos to help you customize your AI Sole System. 

    • Watch this video to determine your foot type and discover which pattern will work best for you.
    • Watch this video to see how to size and build your modular performance insoles

    If you have any questions or need help determining your foot-type, contact us and we will build the insole for you.





    Discover how you were meant to run!

    Natural Running teaches you to run the way nature intended, mimicking the balanced, efficient barefoot style you were born with while keeping your feet safe from rough modern surfaces. 

    Backed by studies at MIT and Harvard, running form and injury expert Danny Abshire explores the science of how the body evolved to run, giving you the practical tools and information to analyze your own feet and form.  Natural Running offers technique, drills, and an 8-week transition plan for faster, better, healthier running.