Store your clean pad in it when you go out, pop your used one in it to bring it home. As simple as that. The Moon Purse is made from polyester fleece, and it measures 7" x 5". It will hold your used cloth pads without leaking onto anything else. The regular size will hold up to two Regular pads, The Mega size will hold one Mega pad or two Slim Megas. It measures 9 x 7.5".