• Compatible with LG HBS-1100, Etymotic Research, Westone, Klipsch, Shure, and headphones with a 4.5 to 6.3 mm nozzle. • Made of patented memory foam 30 times softer that reduces pressure in the ear. • Provides a superior audio experience with enhanced bass and external noise blocking. • The foam is activated by body heat to adapt perfectly to any type of ear canal. • Ergonomic design ideal for securing headphones and preventing them from falling out during physical training. • The set includes various sizes to find the perfect fit and incorporates a custom storage box.