Get a clear picture of how you're sleeping, recovering and moving with this Leep smart ring. It tracks your heart rate, HRV (the variation between heartbeats), blood oxygen, stress and skin temperature around the clock, then turns it all into simple insights in the Leep app. There's no monthly subscription, so every feature is yours from day one. The titanium band is slim and comfy enough to sleep in, and it's water resistant up to 50m, so you can wash up or hit the gym without taking it off. You'll get up to 8 days from a single charge, and the travel charging case holds up to 60 days of backup power, so a long weekend away won't mean packing another charger.

Please note, to get the most out of this product's features, you'll need to download the free Leep app, which is available on iOS and Android devices.