The pair of medium Dekoni Audio Bulletz Gemini Series Premium Memory Foam Eartips is designed to replace your current eartips with high-quality memory foam. The slow-rebound foam is washable and made to last whether you wear them casually or while running a marathon. Simply pinch the eartips between your fingers and roll. Once placed in the ear, the memory foam expands, ensuring a tight, well-isolated fit that brings you closer to your audio.