Material 100% Safe - Chew necklaces for sensory kids made of foodgradesilicone, and do not contain any latex, BPA, PVC, or phthalates. Our satin nylon cord wont irritate skin or pull hair. Freezer safe. Children over 3 yrs use suggested.Sensory Stimulation - Chewing can promote attention and focus, our chewing necklace can help your child relieve anxiety, reducing fidgeting and increase concentration. A therapy tool for children with ADHD, SPD, special needs or kids with sensory processing disorder.Medium Firmness - This oral motor chewy tools are soft to the teeth and gums but still very durable for long term use. Our sensory chewy necklace are medium firmness will be the right fit for most chewers. For highly aggressive chewers, it is not indestructible.Design and Size - The chew necklace design is popular with children. Right size chewies, the cords are easy to shorten, just simply push the cord through the breakaway clasp and retie the knot at the desired length.EasyToClean - Our oral sensory chew toys is very easy to clean with mild soap and water or place in the dishwasher.