All you need to do is present your receipt and get it at Crocs stores, it will contain vouchers which will equate to a different treat just on these dates. You can get a Php100 discount on your next footwear purchase (regularly priced of course!) or get a free fancy Jibbitz which makes Crocs even better if you're into that kind of fun and design. Each Ang Pao can only be used in one transaction so make sure your next purchase is worth it, perhaps you can buy a family or friend another pair just for the heck of it!
Participating branches include SM MOA, Megamall, North Edsa, Pampanga, Cebu and Davao. You can also get it from Ayala Malls like Trinoma, Bonifacio High Street, ATC and other participating malls nationwide. Don't take my word for it, just head on to your nearest branch and ask about it!