This Ushanka hat was hand-knit using 100% Siberian angora (pre-war). This yarn is spun from the "brushings" of French angora rabbits pictured below. [These hats are not made from rabbit pelts; the rabbits aren't harmed.]
This design includes a traditional top-flap over the forehead, yet this flap only for style and is sewn into place. The side flaps completely cover the ears when the cross-straps are lowered for those bone-chilling days.
