For wings on salmon and steelhead flies like bombers and seek & destroy patterns we like calf body hair the best. It has the right amount of stiffness to maintain posted positions and it is soft enough to handle easy. Calf body hair is a bit straighter and more uniform than tail hair. Patches are available in 3.25″x3.25 or 6.5 x 6.5″. Available in white, black and white mixed (ratio may vary) and black.