Not berets, but made in a very similar way on a SHIMA SEIKI Whole Garment Knitting Machine are these Skullies in 100% mulberry silk. 

Perfect hats to wear your 'round, be it summer or winter, chilly or hot. High-grade natural silk is a light and supple material with excellent water absorption and retention qualities. 

Wear it Japanese style under your beret, covering the ears, in winter!

Comfortable, breathable and stylish in a 100% natural material. 

$38.50

Skully - Silk