Leg Cooling Clay. STAYSOUND is an internationally acclaimed cold clay which cools, soothes and tightens hot tired legs. STAYSOUND is ready to use, easy to apply and has a superior longer lasting formula, with no need to wrap or bandage, and is easy to wash off. Technical description: Composition: Kaolin. Sodium Borate. Glycerine. Natural Thyme Oil. Purified Water. Usage instructions: Instructions for Proper Use: Routine use: Apply directly to knees, fetlocks, shins and tendons after periods of training. Spread evenly about 6mm thick. For more prolonged effect: Wrap with moistened brown paper and bandage. Repeat as necessary after 24 hours. To remove: Hose off with water.