Firstly, my 4 yo does not compete in triathlons, so I can't really review based on they type of shoe they are, BUT my husband and I are runners and my son typically runs 1/2-1 mile with us daily, so not any sneaker will do...I prefer one that is actually made for running.  I have always purchased Saucony for him because the price has been lower and it's a quality running shoe.  But I saw these and fell in love with them, because well, neon.  And I run in Asics and love them! My kiddo is currently in a 9.5, so I bought a 10, which seemed to be a steal at $33.  Unfortunately, they are the exact same size at his 9.5 Saucony shoes, so I have to send them back.  I would order a size up if they weren't $45, buuuuut I'll stick to the $30 Sauconys since they only last 6 months before he outgrows them :(