Falke Cosy Plush Short Sock (46380). The Falke Cosy Plush Short Sock 46380 has plush inside, reinforced toe seam, and stay-put cuff with accent knit. Socks is designed with wool and alpaca for extra coziness. Falke's Cosy Plush Short Sock is made of acrylic/polyamide/wool/alpaca/polyester/elastane.