If you need to store your Omnigrid® cutting mat between projects, never stand the mat up, leaving it unsupported and bending. This can permanently misshape the mat and it will no longer allow your cuts to be accurate. Never roll your mat. Store it laying down (flat) is the best option. Make sure it is stored away from any sunlight or heat. Extreme cold temperatures can also cause the mats to become brittle, so it is best to store a mat in a temperature controlled environment. Some of the smaller mats can be placed in a hanging organizer for easy storage.