Cutting mats are hard to transport, just because of their size. And I have broken two rulers. Going to sew-ins, retreats, and workshops has just become a lot easier with this ready-to-go bag in which all items are secure. One of the interior pockets has my spare rotary cutter and even an extra blade. The last adaptation I made to this bag was to use Soft and Stable byannie.com for the tote straps. This batting provides a nice stability that a bag of this size needs.