evo.com | Outdoor Research Ball Caps > Cold enough for the Yukon, cozy enough to stay out there. The Outdoor Research Yukon Cap brings full winter coverage with fold-down ear flaps, a foldable brim, and a soft wool-blend lining. Built for crisp air, snowy trails, and whatever the wild throws your way. Foldable Brim Main Body bluesign(R) approved 100% Recycled Polyester Lining bluesign(R) approved 92% Polyester / 8% Wool Ear Flaps | Outdoor Research Yukon Cap 2027 - Large in Red | Wool/Polyester