How long can my sleeve stay in the freezer? Team Freeze Sleeve May 25, 2017 19:39 Updated Follow Indefinitely! it will not harden, but it is always recommended that it stay in a freezer bag to protect it from defrosting or ice cream! Continue Shopping Related articles There is this plastic bag in my package... Do I need this? How long will it take my sleeve to get cold? How long will my sleeve stay cold? How tight should the compression be? Caring for your sleeve Comments 0 comments Please sign in to leave a comment.