I purchased this a few years ago for a Gelatoni (small size), but I haven't used it and kept it stored in plastic at home. More than half of the back is Velcro, so it's easy to put on and take off, and I think it would be easy to match with Duffy or other characters. It seems suitable for Halloween around this time of year. I'm not sure what the black string is for. Please comment before purchasing. The size is listed as 60 cm, but this is just a required field and doesn't reflect the actual size, so please don't consider it.