Yep. Not only is this for real, but I own a pair. A girlfriend of mine found these little gems online and my toes will never be the same.
Serious gear for the serious metatarsal, these jelly-like accouterments can help resolve the cramping and curling that often accompany flip flops, stilletos, stilletitos, and other non-foot-friendly foot wear.
Probably costing somewhere in the realm of $0.24 to make (not each, but for the set) - these babies retail for $50 (shipping, handling, and gouging included).
"There's a sucker born every minute...and two to take 'em."
- Joseph Bessimer