2022 Pro-Stays™ Collar Stays | pro-stays.com; All Rights Reserved | What Are Pro-Stays™? Pro-Stays™ are collar stays (also called collar stay, collar stick, collar tab, collar stiffener, collar stiff, shirt stays) that provide unmatched collar stability. Pro-Stays™ are designed to make your button-down collared shirts look perfect. What are the best collar stays? Unlike traditional collar stays that only keep your collar solid for a brief period of time before getting “lazy,” Pro-Stays™ fortify the stability of your collar band so your collar stays high and tight.