The Formula Beanie is designed to keep you warm either under a helmet or not The 95pct acrylic material is soft comfortable and warm for an added level of coziness The reversible design allows you to wear this hat two different ways for variety Keep your head warm this season with the regular fitting Formula Beanie from KJUS 95pct Supersoft Acrylic 4pct Polyamide 1pct Spandex Reversible for versatility Regular fit Circular knit design