We first talked about the iSkin Duo iPad (US$49.95) in a post a couple of weeks ago; it's the iPad skin with built-in Microban® antimicrobial protection. iSkin was kind enough to send three of the units to review and then give away to TUAW readers.
The Duo gets its name from the two-tone color scheme applied to each of seven different models, but the fact that it protects your iPad two different ways (from scratches and from bacterial buildup on the skin) could have also factored into the product naming.
Made of silicone, the Duo skins provide a non-slip surface. The bezel cover (which is black on all of the models) and the back of the lower back panels (about where you'd grip the iPad in your hands in portrait mode) are given a slight texture to make them even more easy to grip. The silicone is thick enough to protect the iPad from day to day bumps and scratches, and even covers the volume, power, and home buttons to keep moisture or dirt from getting in.