In-ear headphones from KitSound that both fit well and have good sound isolation. No matter what you're using them for, we're sure you'll find them to your satisfaction.
From OnBuy
"KitSound" KS1IPBK KS1 Stereo In Ear Earphones Headphones Mic Black
OnBuy
KitSound KS1 Colours In-Ear Headphones with In-Line Mic Compatible with Smartphones, Tablets and MP3 Devices Including iPhone 4/4S/5/5S/5C/6/6S/ - Gold