In honor of Prime Day, Amazon is going against the norm with the first-ever price cut on Oura Ring 4: With a 15% reduction on all sizes, you can now buy the Oura Ring 4 in silver, size 10, for $297 from $349. Other sizes are also on sale, but some of them are already sold out.

IT FEELS LIKE there are fitness trackers everywhere for you to help you stay on top of your health data, but Oura Ring stands out from the pack with its unique design. Their smart ring doesn’t just look good: It funnels 24/7 health tracking to an app that serves up daily scores on your activity,

And after spending months testing the Oura Ring and the Apple Watch for your Cosmo reading pleasure, I knew it was time to take things to the next level with a Very Serious Gadget—the WHOOP, a screen-free health and fitness tracker worn by Sha’Carri Richardson,