The Blood Type B Negative PVC Patch is made of durable PVC material designed to withstand wear and tear. This patch makes for a thoughtful addition to any service member's attire. This particular patch measures 2 3/4 inches by 1 inch. Made in the USA and outfitted with durable loopholes, these patches can be fastened onto footwear and hung from keychains or carabiners, making them a great option when customizing your gear. Check out our collection of various PVC patches and get started on customizing your gear today!