Tourna Tac Rag Grip Enhancement : Tacky bee's wax is permeated in the Tac Rag delivering instant, gripping power with no mess. Just wipe your hand or racquet grip and the tackified cloth delivers a safe, non toxic layer of moisture repellent. The more you rub or dab on, the tackier it will feel. It will not stain and it dissipates quickly... so it doesn't leave a lingering sticky feel on your hands. Use the Tac Rag as often as needed. When the Rag turns gray, throw it away. The Tac Rag usually lasts 4-6 weeks of average use. Comes with a handy zip lock bag for storage.