SMS Audio has introduced the availability of its new Sport Collection of headphones featuring sweat-repelling nano technology in-ear and on-ear headphones designed for active lifestyle use. The new SYNC by 50 Wireless Sport on-ear headphones ($230) and the STREET by 50 Sport wired on-ear headphones ($180) are made using a durable rubberized material finish that SMS Audio is calling its 40U coating, which resists scratches, chipping as well as fingerprints. With an IPX4 rating, the SYNC and STREET Sport headphones are both sweat and water-proof thanks to a special nano-coating technology. Both of these headphones also have large, memory foam-padded Oval-Fit ear cushions covered with perforated leather for maximum comfort and breathability.