Your Tan Application Bestie. The TechnoTan Tan Application Back Strap An innovation designed to bestow a flawless tan to the challenging back areas. Achieve an even, streak-free finish while keeping your hands tan-free. Features include stain-free hands, even application and ease of use. Apply your tanning product to reachable areas with an Application Mitt, then use the strap for hard-to-reach regions.