Woolpower Long Johns With Fly 400 GreenWoolpower 400g Long Johns with Fly in green are made from the unique Ullfrotté circular knit fabric with terry loops providing a Merino base layer with excellent insulating and wicking properties. With no lengthwise seams and a gusset in the back optimal comfort is provide. Cuffs are knitted in. With fly.70% Merino Wool28% Polyamide2% Elastane