Penguin (4" x 4 1/2") These fun, friendly, reusable cold packs will make any child's bump or bruise a little better. These cold packs feature a patented gel formula that provides up to 30 minutes of therapy after just one hour in the freezer. These packs are sized to easily fit in a child's hand with elite smooth covers that stay soft and flexible. These easy to take care of packs are hygienic, just wipe clean and refreeze. Boo Boo Buddy Cold Packs are latex free!