Nike Mayfly The world's lightest racing shoe, the much talked about Nike Mayfly is here. (For an article from espn on the mayfly click here). The Nike Mayfly is designed with only one thing in mind, running fast. Tipping the scales at only 4.8 ounces it is so light it is only designed to last 100k (60 miles). Men: Suggested price: $ 49.99 + 8.276% avg sales tax = $ 54.13 Suggested Retail Price with sales tax* Your price $ 38.24 - Save $ 15.89 Click Here to buy from our partner eastbay.com Price includes LetsRun exclusive 15% off discount on orders $79+ by entering code LKS19LR2 at checkout. Plus No Sales Tax (except in WI)