I spend a lot of time read review look for a good set of ear phone or ear bud to use while work out . I like to run on the treadmill and have a problem where a lot of my sweat will run down into my ear and temporarily short out my ipod ear bud . after much comparison , these ear bud sound like they would fit the bill . I be not disappointed ! the great thing about these ear bud be that they swell up in the ear and block out the sweat while work out , they hold in the ear very well , they be considerably low price , they block out external sound very well ! I be recently read a article where a study be do by a university and find that you can only listen to you ipod -lrb- or other -rrb- for about 60 minute every day without damage you ear . if you turn down you volume you could extend that amount of time . that remind I many time where my ear start hurt after extend use of my ipod where I be listen to audiobook . the reason I mention this be that with these ear bud I be able to turn down the volume and still hear my audiobook . the main problem with listen to audiobook be that you have to turn up the volume enough to where you can make out the word over external sound . with these plug you be able to reduce the external sound , thus you can turn down you volume as well ! I find this extremely useful on long road trip where my 3 year old daughter listen to the dvd player in the back seat while I be in the front seat . these plug allow I to drown out the dvd player and focus on my audiobook without give I a headache from loud volume ! the deliver package only come with the ear bud , one set of ear foam plug already attach , and a extra set of ear foam plug for later use . the only draw back be that after 3 week of use one of the ear cut out and stop work . I be very hard on the product and have have the ear plug pull out of my ear and the connector yank out of my ipod many time . I go back and read some more review ... I find that other people have this same problem . I go online and find that I might be able to solder a new connector on . I decide that I love the ear plug but I do not want to purchase 12 set per year . that would add up to enough money to buy a quality pair that would last I much longer and give better sound . I have a soldering iron . I have do a little bit of soldering , I be by no means good at it ... I buy a 1\/8 '' stereo audio connector from Radio Shack and give it a shot . I cut out the extra non-copper fiber that would prevent good conductivity and solder it together . it work great now ! we 'll see how long it last this time : -rrb- I would give it 5 star if the connector be better !