I used to use tacs before I found these and now no more puncture wounds for my ties. very durable and easy to use. You do need to find the right medium of the shirt to place this ifb you want it to look right. For me it was usually just the button at the bottom of the sternum and the one below that. If you place them on the wrong buttons it is an easy adjustment. If you wear these often you will remember what buttons to use.