Your 35oz Müv mugs, Nav tumblers, and Resa Straw Tumblers are equipped with a swappable silicone sleeve that protects from dents and dings. Snag another sleeve to make it uniquely yours. Step 1: Pick a Müv 35oz, Nav 35oz or Resa 35oz.Step 2: Choose an additional swappable sleeve.Step 3: Swap your sleeve to mix and match to your mood or your fit.