Idaho runner’s race-day outfit looked ridiculous. Then he made history.

Most marathon runners look for ways to stay cool and comfortable over 26.2 miles. David Rush took the opposite approach, completing the Idaho Potato Marathon while wearing 125 T-shirts and earning a Guinness World Record for the most shirts worn during a marathon. The record-setting run took place May 16 in Boise and was officially certified by Guinness World Records in July, Yahoo! reported.