Adjustment at the head and under the chin.
Superior 50+ UPF sun protection.
Attaches with a clip under the chin.

S: 0-6 months, head up to 45cm (17.5in) with 5.0cm wide brim

M: 6-24 months, head up to 50cm (19.5in) with 6.0cm wide brim

L: 2-5 years, head up to 53cm (21 ″) with 6.5cm wide brim