Sennheiser CX 475 Premium Earbuds Black (Discontinued by Manufacturer) Premium In-Ear noise blocking headphone with massive bass Completely customized fit via the supplied soft silicone ear adapters (hypo-allergenic, S/M/L) Unique combination of ear-plug and hi-fi speaker combats noise pollution Works with all 1/8-Inch (3.5mm) headphone plugs including smartphones