If you worry about BT-300 slipping and sliding down, check this out: Temple Straps (Set of 3) » Rochester Optical
And for long periods of wearing the device, the nose bridge is really going to help (assuming you don't have their prescription insert already): BT-300 Nose Bridge » Rochester Optical
And for long periods of wearing the device, the nose bridge is really going to help (assuming you don't have their prescription insert already): BT-300 Nose Bridge » Rochester Optical