thanks for the replies! The reason I'm not using my nano is because I'm selling it to my girlfriends mom to give to her little sister. And why not use invisible shield? I've heard nothing but great things about it, unless you count the people who used way to much water and ruined their ipods. The only time I really use my ipod is in the car and gym, and sometimes when I walk to class. I dont need a case in the car, but at the gym I would like to have some protection since I've dropped my nano many times but it was protected with an iSkin (agreed, they are great!). That's why I'm not getting a normal case for 24/7 use because I never drop my ipod unless I'm working out and I don't like the added bulk that cases add. The only case I would consider to use all the time is the Agent 18 but I've heard that dust gets under it and you have to clean it out every few days. So really I'm just looking for a workout case and was just wondering which one works best (like has the least shaking and is most sweat resistant).