Made from a comfortable material thats designed to keep your iPhone on the one spot in your arm, they are easy to fit, and allow the iPhone to be taken off quickly, should you need to answer it.
They fit your arm snugly with elastic, and are made to withstand the g-forces incurred from hard-core exercise.
They come in a range of styles and colours, and are really inexpensive. Browse the range of iPhone Arm Bands available on eBay below.
Nathan Super 5K Universal Arm Band Fuchsia fit iphone 5 galaxy s3
Lifeproof 1043 LP iPhone 4 4S Arm Band
Belkin EaseFit Plus Arm band for iPhone 5 5s 5c and iPod touch 5th generation
CUSTOM NFL TEAM LOGO Iphone 4 and Galaxy 3 Cases 32 Teams to choose from
Nathan SonicBoom iPhone 5 Arm Band Floro Fuchsia
Nathan SonicBoom iPhone 5 Arm Band BLK Lime
Sport Holder+SPORTS WORKOUT ARM BAND CASE FOR ATT iPhone 4S 4SG+BLK Headset
Rocketfish Arm Band Molded Case iPhone 3G S Open Box
Nike Womens E1 Prime Performance Arm Band for iPhone 4 4S Blue
Lifeproof Lets Go Arm Band for IPhone 4 and 4s
Incase Sports Arm Band for iPhone 5 5S 5C Gym Running Walking Jogging Hiking
Arm Wrist Band Strap Case Cover Holder for iPhone5 5S Running Sport Gym by TFY