March bracelet, or "martaki" as we call it in Greece, is a seasonal bracelet (usually just a red and white string) we wear in March "to protect from the sun". By the end of March you take it off and you hang the little piece of cord on a tree so the birds can use it for their nests. That's why I like to make mine with cotton cord (biodegradable). But I sent it with a bit of nylon cord too, so you can replace it and keep wearing it after March is over as a necklace.