ISOtunes Sport Advance Trilogy Replacement Foam Ear Tips5 Pairs Extra Small/Small Short. The ISOtunes Sport custom-designed ear tips will seal your ISOtunes Sport noise isolation headphones to your ear canal for the ultimate noise isolation. The case is made of hard plastic to ensure durability. Fits all ISOtunes Advance noise isolation headphones regardless of the size. These tips are reusable and comfortable enough to wear all day long you can wash them as often as you like; just pop them out when you use them. Specifications for ISOtunes Sport Advance Trilogy Replacement Foam Ear Tips: Manufacturer: ISOtunes Sport Quantity: 5 pair Color: Black Package Type: Clam Pack/ Plastic Package Contents: ISOtunes Sport Advance Trilogy Replacement Foam Ear Tips ISOtunes Sport IT-50: Advance Trilogy Replacement Foam Ear Tips5 Pairs Extra Small/Small Short