From old sweaters.

These sweater owls are so cute! Upcycled Felted Wool Natural White Owl with Grey

Pöllölapaset - No instructions for mittens, just graphed owl chart to add to your own mitten pattern.

Knitted leg warmers

Dark Gray Leg Warmers Lacy Knitted Button Down Boot Cuffs LegWarmers with Crochet Lace Trim