We've included both flat and non-flat standing desk mats on our list of favorites. Both offer their own advantages! Flat mats are easy to move and store, and they provide uniform cushioning, which can feel great underfoot. On the other hand, non-flat varieties are designed to accommodate various angles and foot positions. This makes it easier to shift around and change your stance as you work. If you're someone who gets in the zone and doesn't require a ton of extraneous movement to concentrate, this this feature will be less important to you. However, some people find that they're more productive when they can fidget or stretch a little. If that sounds like you, then consider a mat that has rounded edges, rocking sides, or foot rests that let you engage those muscles at any time.