The product includes: 1 pair of mouth guards, sizes: S: 35-38, boys and girls choose their own size. Black, blue, skin color available Material: Made of soft and comfortable grade A gel, the heel pad is made of breathable cotton, soft silicone and skin-friendly fabric to absorb vibration and reduce tension and stress with every step. What it does: These heel spur relief products give you the best running experience, relieve pain, and prevent and restore cracked heels. Comfortable and adjustable design: The Velcro design keeps the straps easy to stretch, and they adjust to different foot sizes to keep your feet snug and comfortable, and to keep the gel heel in place as you move. Reusable and comfortable: these gel insoles can be removed and reused to use the shoe. If the heel pad gets dirty, just wash it with warm soapy water and let it dry before using it again.