Today we're introducing one of our special feature types here at Groupon: the Freeon, a coupon for a chunky discount that we're making available for free. Like all deals here at Groupon, no one gets the deal unless enough people sign up (25 for today's deal), so join early and spread the word - if 25 people join by midnight, we'll email you the coupon the next morning.

Today's Groupon gets you 25% off any hair service from Lather Salon at their locations in Lincoln Square and Wrigleyville. Lather's website lays out their hair philosophy, promising to "look out for the best interest of your hair, and do everything in [their] power to provide you with the healthiest hair you’ve ever had." But don't worry - after investigation, we learned that Lather will not go so far as to kill the hosting organism in pursuit of the ultimate 'do.

Look no further than Yelp to see how people feel about Lather. In a word - euphoric.

We could go on, but why bother? The value is apparent - a great deal from a great salon, and it's absolutely free. Enjoy!