This is a teething ring, natural rubber, and flexible. From 3 or 4 months, it's great for baby (even if it is not his teeth): There is well in hand; it is flexible, so that baby can also play with (eat it, shake it, bend, etc.) without the risk of getting hurt. Ours spend a lot of time with and seems to enjoy it. Good price / quality ratio, especially in view of the price on amazon.