Olympic swimmer Michael Phelps recently showed off a pair of custom Under Armour shoes that have the footprint of his son, Boomer, on the left insole.
At the U.S. training center in Atlanta, Phelps showed his new shoes to NBC commentator Rowdy Gaines, who tweeted out a photo.
The read and white shoes are feature Phelps’s own logo. Phelps has been endorsed by Under Armour since signing a deal with the apparel company in 2010.
Phelps most recently competed at the U.S. swimming trials in Omaha, winning the 100 and 200 meter butterfly events to earn his fifth trip to the Olympic Games.
Boomer, who will be three months old at the start of the games, and Phelps’s fiancée Nicole Johnson will both be at the games to watch Phelps attempt to add to his record medal total.
Phelps is the most decorated Olympian ever, having won 18 gold medals.