AKG K374SLV Premium High-Performance In-Ear Headphones, Silver True high-performance AKG sound Real aluminum housings provide superior acoustic dampening, extended bass response and reduces the resonances that can compromise sound quality Closed-back design helps impede outside noise from entering your ears while also preventing the sounds that you're hearing from leaking out for the outside world Silicon sleeves in three sizes for the perfect fit (S, M and L) Carrying pouch included