Designed for the most demanding use; the Chuckit!® Ultra Ball® is not your dog's ordinary ball. Simply put; this is the best ball for the game of fetch. Developed to have high bounce; high buoyancy; high visibility; and high durability. The Chuckit! Ultra Ball promises to outplay the ordinary. Can be used in the water and is designed specifically for the game of fetch. Features an extra-thick rubber core and quality material that floats. The bright color gives increased visibility and helps to prevent the ball from getting lost. Compatible with Chuckit! Launchers. Available in Small; Medium; Large; X-large; and XX-large in a one or two-pack.PRODUCT NOTE: We recommend that you supervise your dog during playtime and remove the toy from your dog if it becomes damaged or parts become separated. Discontinue use if the toy is damaged. No dog toy is indestructible; and every dog interacts with its toys differently. Supervised play will go a long way toward helping your dog's toys last longer.