Sennheiser PX 100W Supra-Aural Foldable Mini Headphones (White) (Discontinued by Manufacturer) Great for travel and outdoor use with mobile sources such as CD, MD or MP3 players Fold and flip design allows the ear cups to be turned 90 degrees, folding the headphones closed Crisp and fast bass response due to system "twin damping" with 80ppi polyurethane and special perforated elements Robust steel headband with metal joints, steel-reinforced headband ends, connection to the ear cups tested for durability Special baffle ensures very balanced sound image for all types of music