Breathable & Waterproof: Waterproof and breathable, allowing your skin to breathe freely, while providing the best protection for the sensor. Strong Adhesion: The sticking is firm, so you don't need to worry about falling off when you wear it in the shower. Easy to Stick: Just tear off the backing paper, you can anywhere on your body. Premium Quality: Made of high-quality elastic fabric material, close-fitting and comfortable, can be easily torn off. Widely Application: You can use it with your sensor, and you can wear the sensor for running, showering, swimming, mountaineering and other activities. Due to different batches, there may be differences in product appearance and printed text, which will not affect use Colour:A: Black Material:Stretch fabric + acrylic Package Contents: 100 x Sensor Adhesive Patches Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.