So many uses. I ordered the next size up as well, to test to be certain,but found they were too loose on the heals. Catches what you want, while canceling out a lot of background noise. - Anker has a great 18-month warranty. 5 sometimes 8. The hooks keep them in your ear securely, theyre light, and the shape of the earplug itself is tilted so they dont slip out. 4 S. same day! A huge improvement over newports. El diseño en general no es muy bonito, pero es funcional pues puedes poner diferentes conectores en diferentes posiciones lo que evita que se pierdan enchufes por la distribución de los conectores.