Spring mattress wholesale manufacturer today: If you have a two-sided mattress , one way to increase its longevity is to flip and rotate it regularly. This is especially important in its first few years. Follow the manufacturers’ recommendation for how often to flip your two-sided mattress, but a good rule of thumb is to flip and rotate every 3 months during the first year and every 6 months thereafter. Some mattresses will be with handles on the side boarders, but please be noted that the side handles are just for…