This Case fits iPod® Nano 3rd Generation 4GB and 8GB only. For iPod Nano 3rd Gen (the one with video playing abilities), the Otterbox defender provide three layers that will protect your iPod from bumps, shocks, drops, scratches, and all other routine threats to your fragile device.
3 Layers of Protection
First, a clear Polycarbonate sheet with high performance hard coating that offers chemical and abrasion protection
Second, a hi-impact Polycarbonate skeleton
Lastly, a Silicone skin to absorb bump and shock
This case is not waterproof. For a waterproof case for iPod Nano 3rd Gen, the Otterbox Armor for 3G iPod Nano is what you'll want.