1.2 lb, maxflex xr extended release joint formula, easy to use powder, in a 30 day supply container, scientifically formulated to provide 24 hour joint care, 1 daily dose keeps glucosamine in your horse's system a full 24 hours, over 24 times longer than other joint supplements, extended release glucosamine releases slowly over time, providing a constant supply of available glucosamine to the joints, research has shown that extended release forms of active ingredients can extend the action of the active in the body, contains 5000 mg of extended release glucosamine, combination of trusted joint supplement ingredients glucosamine, chondroitin sulfate, hyaluronic acid & msm.