Best Buy offers the Panther Vision PowerCap Beanie or Baseball Cap for $5.49. Opt for in-store pickup to dodge the $5.99 shipping fee. That's a buck under last month's mention for the beanie version and is the lowest price we've ever seen for any version of these PowerCaps. (It's a current low by $8.)
Forget young at heart — science says these tricks will keep you young in mind.