If you want to take your music listening experience to the next level and at the same time protect your hearing consider the custom fit silicone In-Ear headphones by Dutch company earproof.

The earproof In-Ear headsets are made form soft silicone that is shaped to fit your ear. The company uses transparent silicone, which practically disappear when placed inside your ear. Only the thin Teflon wires are sticking out, giving you a very ‘Cyborg’ look.

The custom earproof monitors eliminate almost all ambient noise and you can listen to music at lower volume, which protects your hearing on the long run. Custom Earproof headsets have their price and you need to visit their shop or meet them at events. Depending on the model a custom molded headset can run up to about $1,100.
More details on the earproof site. (Thanks Chris W.).