6-Pack of Practice Pinnies (Scrimmage Vests) for Soccer and Other Sports A great value! Practice pinnies in bundles of 6 per size/color. Pinnies (also known as pennies or training vests) made of lightweight, durable mini-mesh polyester. Great scrimmage vests for soccer, basketball and other sports. Also a terrific way to help identify staff and personnel for events. Available in several colors, youth and adult sizes. By Code Four Athletics, a sports specialty brand.