This really has to be a 'must buy' - for your sake and your horse's/pony's. Just pop it on your hat (we've yet to fit a hat it doesn't fit) and be reassured knowing it's there. The tape is 100% reflective and can easily be wiped clean with a damp cloth. On the inside, the sticky rubber grips the hat securely (no 'pinging off' with this brand). It will not damage velvet hats (though we do suggest you take it off after use as prolonged wear will effect the velvet). Elasticated in two parts for a better and more secure fit. One size fits all.