Protect your phone and make it compatible with a variety of optional accessories by using the Mobile Everyday Smartphone Case for Samsung Galaxy S21 Ultra from Peak Design. The slim 0.1' case provides a stylish and durable nylon fabric skin, as well as a rubberized bumper for drop protection. The back of the case sports Peak's proprietary magnetic-mechanical SlimLink connector with Zirconia ceramic locking ring, making your phone compatible with Peak's Mobile ecosystem of mounts, stands, and wallets. Please note that due to the array of magnets embedded inside the case, a Samsung S-Pen can't function while your phone is in the case.