Impact Gel Red Shock Resistant iPhone 4/4s Case Compatible for iPhone 4/4s 2mm of eco-friendly Impact Gel provides your phone with XTREME ARMOUR protection against accidental drops and falls. Ultra slim design for comfort in hand and an easy fit into your pocket Access to all buttons and features on the phone, including flash opening for ideal picture taking Military grade tested and approved Impact Gel dissipates impact and vibration away from your phone.