REI Down Booties - Men's

450-fill-power duck down insulation compresses easily for packing
Polyester shells feature a durable water repellent treatment to fend off moisture and light rain
Soft polyester fleece linings are heaven on bare feet
Elasticized instep straps keep booties secure
EVA midsoles help provide cushioning underfoot
Polyester soles sport polyurethane beads for enhanced traction
Small fits men
's shoe sizes 7 - 8 ; Medium fits men's shoe sizes 8.5 - 9.5 ; Large fits men's shoe sizes 10 - 11 ; X Large fits men's shoe sizes 11.5 - 13

REI Down Bootie sizing:
Small fits men's shoe sizes 7 - 8
Medium fits men's shoe sizes 8.5 - 9.5
Large fits men's shoe sizes 10 - 11
X Large fits men's shoe sizes 11.5 - 13