Here are some tips on what to wear to gymnastics class, for comfort and safety: Generally: No loose clothing, no jewelery, no socks or tights with feets because there can be slipping. Hair should be up so it won't be caught in something. Girls: Leotards are best, with bike shorts over them optionally. Boys: T-shirt/shorts (not big or loose) Your gymnastics club might sell leotards, or you can also check the Gym Chat listings directory, under Gymnastics Wear: Gymnastics Wear | Gyms, Sport Clubs, Stores Listings & Ratings/Reviews Directory: Find the right gym, club & equipment for you!