The Slip Leather Sleeve is constructed from the revolutionary d3o an intelligent material that locks its molecules together on impact to absorb the energy of a shock and provide superior protection for your iPhone 3G and 3Gs. Similar to the iBand; the Slips structure safeguards your iPhone without compromising its stylish design. Used by extreme sports brands and professional athletes from around the world d3o offers unique impact protection for your iPhone 3G & 3Gs. At rest the molecules inside d3o move freely making it soft and flexible while at the point of impact or shock the molecules lock together to spread and absorb the force safeguarding your iPhone 3G & 3Gs in a protective layer. Just slip your iPhone 3G into the Slip and feel comforted in knowing that your iPhone is completely shock proof. The Slip also has a pouch for your Credit Cards for those minimalists that do not want to carry too much in their pockets!