Griffin?s AeroSport Armband is the ideal (quite possibly perfect) combination of wear-all-day comfort and features that runners, walkers and athletes of every stripe demand. We start with a light, silky, flexible armband of super-wicking stretch fabric, cut wide so it stays put comfortably. Adjust to fit your arm, then clip the iPod case itself on to the band. Full screen protection for your iPod and a hidden pocket perfectly sized for your house key or gym membership card. We?ve even included an ingenious little cord wrap that keeps your headphone cable out of the way. Hi-visibility reflective print pattern helps visibility at dusk or dawn. Compatible with iPod nano 4G.