Child Medium with matching scrunchie GK is known for our unsurpassed fit. GK uses 4-way stretch fabrics and a proprietary stretch formula to give you the best fitting garment in the industry. Whether you're gearing up for practice or a competition, it's important to look and feel your best while doing gymnastics. With so much movement going on, GK Elite understands the importance of remaining comfortable and wearing durable long-lasting gymnastics clothing.