Specification Brand TRNColor Black Red Blue GreyMaterial FoamInner Diameter 4 5mmSize S M LCompatibile most earphone nozzles from 4mm 5 5mmMemory Foam Diameter Large outer 13mmMiddle outer 12mmSmall outer 11mm Features Memory Foam 1 Self stretch deformation filling all the space and maintain the shape 2 Absorb the impact force reduce the vibration low rebound release 3 Never allergies non toxic no side effects 4 Transparent foam hole structure good air permeability Advantages 1 Comfortable and convenientAfter the memory foam tips ear foam cotton being activated by warm it will be filled with different structures of ears canal space and the ear canal and will not produce inflation congestion and other discomfort Not only no need to worry about falling down for the loose but also not produce pain due to inflation It is also a very convenient wearing when doing sports 2 Enhance the music effectMemory foam tips ear foam cotton can produce the seal in the ear canal so that music is almost no loss to reverberate in your ear canal feeling different 3 Noise isolationThe seal can isolate the external noise interference even in noisy environment without increasing the volume up to over the noise which can protect your ears Package included 3 Rebound Memory Foam Tips