Made from premium soft silicone, skin-friendly, non-irritating, and waterproof. Withstands sweat, grime, and discoloration for extended use. Featherweight and bendable build delivers outstanding comfort for everyday wear, exercise, and sleep monitoring. Airy texture helps avoid skin irritation. No-tool fast setup. Just snap your tracker into the band. Several sizing holes and a firm clasp hold your watch steady during any activity