Ezo Deer 120% Satisfaction!! Amazing Volume!! This is the fur of Ezo deer from Hokkaido, processed in Hokkaido. Fly Tying Material Each hair of the Ezo deer has a hollow structure, making it light and buoyant, making it the perfect material for dry flies. The natural oils have a tremendous effect on dry flies that require buoyancy. You can use it when making flies like Elk Hair Caddis. Ezo deer is similar to elk hair compared to regular deer hair.