Lugging blankets around is no fun. But what about a blanket that folds up small enough to fit in a diaper bag, is made of machine-washable ripstop nylon, and has corner weights and loops to keep it in place? Plus, it's water repellent and debris shake right off. Original and quilted Monkey Mats measure 5' x 5' while the Mega version is 5' x 8' but still compact. Quilted versions have a slightly padded surface and a waterproof bottom layer.