Based on this product's specifications, here are some alternatives and similar models
Hat Aptel HTM 629_3-6 — Baby unisex headwear, 100% Merino wool, size 3–6 months
Summary description:
Aptel baby hat HTM 629_3-6 is a unisex headwear item designed for infants (3–6 months). Made from 100% Merino wool, it provides natural warmth, breathability and gentle touch suitable for sensitive skin. Sold as a single piece, this hat is ideal for everyday outdoor and indoor use to protect a baby’s head and maintain comfortable temperature.