Tropical Studies on Extra Credit SW BFL Nylon Sock yarnSometimes you just need a little extra Our Extra Credit yarn combines 80% Superwash Blue Faced Leicester wool with 20% sparkly trilobal nylon for a bit of shine and strength. A real workhorse of a yarn that's still soft and smooshy! Tropical Studies is a low immersion variegated yarn featuring bright coral and pink with a splash of grape. Each skein of Extra Credit contains 450 yards of a 4 ply fingering weight yarn in 100 g. Machine wash gentle and