The ear phones made for the sports use are made in a special way so that they are not damaged by sweat or moisture. Sports activities and the related workouts lead to heavy sweating. The moisture spoils the delicate electronics inside normal ear phones. So the earphones that are made for use by sports persons are made of special water resistant material and are not affected by water and most of these are washable after each session. These earphones are made of durable materials that are corrosion free and not affected by bodily salt etc.
Sports activity always involves in vigorous and continuous physical movements. The ordinary headphones that are made of flimsy materials get damaged while doing the sports activities wearing them. But the sports earphones last longer due to their sturdy construction and tough materials used in them. The extra flexibility, strong joints and the good quality of cords that are used in these ear phones are able to withstand the extra stress and forces that can kill an ordinary ear phone.
The next requirement of a good ear phone for sports people is that it must be designed in such a way that they fit firmly and comfortably so that they do not slip often. They come with nice ear attachments. Most of the ear phones designed for sports persons are made for outdoor use and come with a reasonable ability to cancel outside noise so that the quality of the music comes from these sports earphones are nice to hear and stay as such in all conditions. So, if you want to enhance your sporting activity with lovely music go for the right ear phones.