Deciding the perfect backings for your patches is the most delicate part of your design spirit. You can choose any type of backing but you should consider some things first before finally making the final exceptions. The custom iron on patches are highly recommended if you have a cotton material for the apparel and if you have denim then sew-on is probably the best option. The velcro ones are also easy for applicants but many people don't know how to properly use them. However, at the end, all that matters is what really suits your feasibility.