Chicco Physio Soother 4m+, from Chicco research, is the pacifier that promotes the anatomical-functional development of the baby's palate and tongue, supporting their natural sucking instinct. Soft shield made entirely of rubber, it is ideal for sleeping. Tongue groove. By reducing bulk, it allows the tongue to naturally position itself forward and upward inside the mouth. The teat's shape allows the tongue's thrust to be correctly distributed on the palate, including laterally, thus promoting its correct development. Palatal ridges. Small raised areas on the head of the teat, reference points for the correct positioning of the tongue tip for adequate upward thrust during sucking. Super-thin profile. The neck of the teat promotes optimal mouth closure and is angled at the top to accommodate the natural position of the tongue.