The Rock Solid Sila-Flex Glow-in-the-Dark Big O C-Ring is designed for comfort and functionality. This silicone C-ring features a unique glow-in-the-dark technology, which activates after being immersed in bright light or sunlight before use. With dimensions of 1.25 inches inner diameter, 2 inches height, 2 inches length, and 0.375 inches width, it is crafted from Sila-Flex, a premium, phthalate-free hybrid silicone that is unscented and durable. The material provides an ultra-smooth and soft finish with extra stretch while maintaining its original shape. It is recommended to use water-based lubricants with this product and clean it with antibacterial soap and water for maintenance. Color: Teal/Turquoise/Aqua. Manufacturer: Rock Solid.