Support your kids every move with kids’ activewear from Costco, designed for sports, school activities, and everyday adventures. Built for comfort and performance, kids' gym clothes help them stay active while feeling confident and comfortable throughout the day. Discover durable and breathable youth fitness apparel, including athletic tees and hoodies, sports bra for girls, performance leggings with pockets, girl’s and boys' shorts, and kid’s joggers and hoodies made with lightweight, flexible fabrics —all from popular brands like PUMA, Hurley, and Adidas.

From gym class and gymnastics to weekend sports, our line of stylish workout clothes for kids provides exceptional durability that stands up to active lifestyles. Many designs feature moisture-wicking materials that help keep young athletes cool and comfortable during workouts, practices, and outdoor play. Reinforced seams and 4-way stretch fabrics, ensure long-lasting wear, even with frequent washing and all-day use. Costco’s activewear combines performance, comfort, and value, making it easy to outfit kids with reliable and stylish gym clothes that supports movement, energy, and everyday activity.