Schwarzkopf Strait Styling Glatt Hair Straightener. Glatt is a straightener containing an Active Care+ Complex to ensure desired shiny, glossy hair lasts for up to 3 months. The ultimate result is a fashionable, durable and healthy looking style. Strait Styling Glatt with the Innovative Active Care + Complex is the professional straightener for salon use that provides perfectly long lasting straight hair with premium care.