This tingly cold pair of underwear will make your sperm swim betterCasey Chan1/08/14 8:21pm22EditPromoteDismissUndismissHideGo to permalinkYour underwear can save your sperm. Or at least that's what Snowballs believes. What's Snowballs? A type of cooling underwear that basically uses ice packs for "scrotal cooling". Ball air conditioning, basically. It's for the kids.