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 How long will my sleeve stay cold? How long will it take my sleeve to get cold? There is this plastic bag in my package... Do I need this? How tight should the compression be? What happens if I loose my freezer storage bag? Comments 0 comments Please sign in to leave a comment.