Prevents glasses from slipping! ○ Brand new, unused ○ Immediate purchase OK! Product size: Approximately 55mm x 7mm Weight: 1.6g (per piece) Quantity: 2 sets of black (4 pieces total) Material: Silicone Made of soft silicone, these anti-slip covers are comfortable even for long hours of wear. Simply attach them to the part that goes over your ears for excellent stability during exercise or work. The black color is discreet and matches any frame. A set of 4 provides spares and replacements! 1820