The Nostalgia Audio XWB Eartips are premium silicone eartips designed specifically for modern in-ear monitors (IEMs) with larger-diameter sound nozzles. XWB stands for “Extra Wide Bore”, with the enlarged bore intended to provide a more direct and unobstructed path for sound into the ear canal. Nostalgia Audio incorporates a vortex/swirl-vane-inspired internal design, which is intended to promote smoother airflow and reduce unwanted turbulence, resonance and distortion. The result is designed to deliver a more natural, accurate and open presentation while preserving the intended characteristics of the IEM.