?? Feature: --No latex safety material, breathable and comfortable, no residue left on the skin. --Durable to ensure a long stay of 14 days. --The center is designed without glue to prevent damage to the sensor. --30PCS, enough to meet your needs. --Waterproof for swimming, shower, exercise and sports. ?? Specification: Material: elastic cloth Color: Skin/ Black Size: (As shown in the figure) 7.9×6.5×0.05cm/2.9×2.8×0.02 inches Weigth: 1.3g Package includes: 30 PCS Sensor Covers ?? Warm tip: Actual color may be slightly different from the image due to different monitor and light effect. Please allow deviation due to manual measurement.Widely Used: The patch is designed for the sensor (not including the sensor) and is easy to use. The sensor overlay is waterproof and can be used for running, walking, swimming, showering, exercising, daily activities and sports activities. Size & Quantity: The size of the sensor firm patch is 2.9 x 2.8 inches, the right size to stick on the exact position, easy to carry. 30 pieces of sensor cover patches, enough quantity to meet the needs of sports, out and about, daily needs. No Glue On The Center: The sensor waterproof patch middle part for no glue design, in order to facilitate the sensor into, also can provide full protection for the sensor. If you need to replace the patch, will not stick to the sensor, will not cause damage to the sensor. Strong Adhesive: Our sensor tapes are self-adhesive. No additional adhesive is needed when using this product, which is safer and more hygienic. The sensor patch has been tested to ensure a long stay of 14 days without adhesive residues. Please note that the skin should be kept clean before adhesion. Safety Material: Made of high quality by natural cotton, waterproof, breathable and not stuffy. Super thin elastic, comfortable material, skin friendly, suitable for most skin types. Latex-free, hypoallergenic, does not leave residue on the skin.