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The Koss KDX300 In-Ear Headphones feature a noise isolating design with a 10-20,000Hz frequency response. The long 4.0' fabric-covered cord provides enough freedom to move around while the 3 sets of silicone cushions (small, medium, large) provide a custom fit for better noise blocking and comfort.
Noise isolating in-ear headphones
Small powerful speaker driver produces deep bass and clear, crisp sound
In-ear design fits snugly and is ideal for active lifestyles
Includes small, medium and large silicone ear cushions for customized fit