Weight saving is a top priority, too. Studies show that for every 100 grams (about 3.5 oz) shaved off your shoe, running economy improves by approximately 1 percent. The hunt is always on for lighter foams, ways to cut unnecessary material from the midsole, plate and outsole. Stripped-back uppers also …
Read More »Puma Says It Made the Fastest Running Shoe Ever. We Put It to the Test
