Comply NR-1 earphones bring innovative foam design and proven noise reduction technology to the consumer market. The NR-1 makes any loud environment seem peaceful, offering an impressive Noise Reduction Rating (NRR) of 18dB. Featuring Comply Foam Tips which provide super soft comfort and a stay-in-ear fit for today¿s active lifestyles. Compact and portable, the NR-1 makes a great accessory for those on the go. The included Comply Foam Tips are made from unique breathable memory foam that is activated by body heat and becomes ultra soft, reducing irritation and fatigue. Once inside the ear, this foam will expand to create a seal, funneling pure sound into the ear canal, enhancing the listening experience. The comfortable seal allows music to be enjoyed without raising the volume level to compensate for external noise. The angled 3.5 mm plug works with most portable music sources (iPod, Zune, etc), CD/DVD entertainment systems, laptop computers and gaming devices (Sony PSP, Nintendo DS, etc). Each NR-1 earphone comes with 1-pair standard-size and 1-pair slim-size Comply Foam Tips, plus a travel case.