Passive noise isolatingStay in the zone with the Adidas Z.N.E. 01 Wireless Bluetooth Earbuds. The isolating design helps block out distracting background sounds, so you can focus on what's playing.Reistant and comfortableSweat-proof and splash-proof, the earbuds keep your music going on a rainy-day walk or a tough session at the gym. They're comfortable to wear, too, so you can have them in all day long. Long listening time You get 5 hours of listening from a single charge - simply pop them back in the case for up to 20 hours of battery life. Just 15 minutes charging is enough for more than an hour of listening time. The Z.N.E. 01 are made of recycled plastic, so they're kind to the planet too.