Most Brooklyn Bedding mattresses should be rotated every 6 to 8 months but never flipped (or inverted). Our mattresses are designed with comfort layers on top and support layers on bottom, including individually encased coils in hybrid models. We also use higher quality materials that last much longer than traditional mattresses. The exceptions to the “no flip” rule are the Plank and Plank Hybrid mattresses by Brooklyn Bedding, the EcoSleep by Brooklyn Bedding and the Propel All-Foam and Propel Hybrid mattresses by Brooklyn Bedding. These mattresses are designed with varying firmness levels on either side of the mattress and can be flipped to customize your sleep experience.