The patches all have velcro (hooked side ) sewn to the rear of wearing apparel, full ... ) 3) Color: two colors each style4) Backing of the patch: Iron on backing, PVC, hard PVC, velcro, double adhesive5) Border of the patch ... patches all have velcro (hooked side) sewn to the rear of wearing apparel Embroidered Badge for Apparel and Army (with Velcro at Rear)