These black Saint Laurent Yeti 110 ostrich feather over-the-knee boots are definite yes for Anthony has spoken and he says yeti boots are cool again (albeit with a haute makeover compared to their unsexy 70's predecessors). The result of flawless Italian craftsmanship, these Saint Laurent slip-on boots have been crafted from plush black velvet and feature a point toe, a black ostrich feather embellishment, a leather insole and a covered heel complete with a height of 110 mm.