Les Filous Small Dogs Collar Diamond Yellow is a Great collar for a great cause. A portion of the proceeds from the purchase of this collar benefits the American Cancer Society. Also, be sure to get matching leads and keychains. The collar features a slide for easy size adjustment and closes with a highly durable easy-clip contoured buckle for comfort and durability. Printed on both sides. The material is 100 percent dye-sublimated, durable polyester, colorfast, and machine washable.