Features:100 brand new and high quality3 Size and 6 Pairs: Include 3 size ,3 pairs foam tips and 3 pairs silicone tips, you don't need to worry about the compatibility with your ear. You can choose the size freely, also, you can choose foam or silicone tips based on your requirements.Self-stretching deformation, filled with space and keep shapeAbsorb the impact force, reduce vibration, low rebound releaseNo allergies, non-toxic, no side effectsTransparent cell structure, good ventilationComfortable and convenient: After the activation of the body temperature memory earplugs ear cotton, will be filled with different structures of the ear canal space, and ear canal anastomosis, and will not produce inflation, congestion and other discomfort. Do not have to worry about loose and fall, but also because of inflation and pain. Sports wear is also very convenient.Enhance the music effect: Memory earbuds ear cotton in the ear canal produce a seal, so that music is almost no loss to reverberate in your ear canal, feel different.Isolated noise: Sealed from the interference of external noise, even in a noisy environment without increasing the volume to cover up the noise, care of your ears.Material : Foam, SiliconeMemory Foam Diameter:Large: outer 12.95mm ;inner 5.0mmMiddle: outer 12.6mm ;inner 5.0mmSmall: outer 10.8mm ; inner 5.0mmSilicone Earbuds Diameter:Large: outer 12.58mm ; inner 4.56mmMiddle: outer 12.6mm ;inner 5.0mmSmall: outer 10.8mm ; inner 5.0mm Package List:6 x Memory Foam6 x Silicone Earbuds