While Apple Watch Series 4 offers the most comprehensive health features yet and is the number one smartwatch, Apple still sells wearables from other companies in its retail stores and online. One of the latest products to become available from Apple is Spire’s Health Tags that stick to your clothes to seamlessly track heart rate, steps, stress, and sleep.

As spotted by TechCrunch, Spire’s Health Tags take a different approach from products like Apple Watch and Fitbit wearables in a few ways.

First, as the name suggests, the sensors are slim, stick-on tags that ditch displays and can be added to a variety of garments, and they’re washing machine safe. The company sells everything from a single Health Tag for $50 up to an eight-pack for $299. Spire is hoping you’ll forget it’s even there.

Another unique aspect of Spire’s Health Tags is that they feature 1.5-year battery life. The Health Tags track your heart rate, breathing patterns (stress levels inferred from breathing), sleep, and steps. Spire uses its iOS app to help users make use of the data collected.

Spire’s Stone is currently available from Apple, while Health Tags should be available at its retail stores soon. Check out the video below for more details!