Scientists agree that in addition to cooling down overheated elbow joints, sweat provides the much-needed bass riff to the body’s blood-and-tear funk collaboration. Celebrate sudor’s salty contributions with today’s Groupon: for $13, you get $26 worth of sweat-activated workout apparel and gear from ViewSport.

ViewSport specializes in transforming body perspiration into apparel panache, offering a way to visually measure the amount of sweat produced in a workout. Each article or accessory is infused with sweat-activated technology that summons an image only when sufficiently soaked with your body’s energy droplets, visually displaying your hard work during exercises and your uneasiness during baboon encounters. Start the first rep with a plain athletic T-shirt and finish the last curl with a stylish shirt available in different styles for both men and women ($22–$27). Wristbands keep arm appendages limber and double as chic cuffs during a romantic rendezvous over a bottle of vintage Gatorade ($7).

Reviews

ViewSport was featured on Fox Business. The business has also been featured in the Wall Street Journal, Time magazine and Yard Barker.

• Your sport-obsessed friend can now be awkwardly sweaty, yet intimidating to any potential challengers. – Megan Friedman, Time
• They do something kind of useful and they even allow you to be creative. – Connor, Yard Barker