The Ultralight Dolphin Medical Alert Bands Without ID is one of the many fun choices from N-Style ID. The Dolphin wristband is perfect for active children and adults with a wrist size up to 6 1/2". They are made of durable nylon webbing and clasp with a center push plastic buckle. All of the Ultralight and Jelly medical alert bands are interchangeable with the Slider stainless steel medical ID tag.