Venom Thumb Grips for use with PS3 and Xbox controllers
From the manufacturer:
Venom’s Thumb Grips are designed with comfort and game play endurance in mind. The ergonomically designed textured rubber grip fits over the analogue stick on the PS3™ controller to enhance grip and ensure maximum comfort for longer game play. The Thumb Grips are easy to fit in seconds.
• Compatible with PS3™ and Xbox controllers
• High-quality, professional-style textured surface
• Simple application takes only seconds