ONE ION Pro Energy Power Wristband - 4 Colors Available ONE ION signature versatile waterproof wristband. 4 Colors available now (includes Limited Red). Features a perfect combination of sturdy medical grade silicone and allergy-proof 316L stainless steel. Sizing: 6.25 in - 8.25 in (16 cm - 21 cm). Width: 0.5 in. (1.3 cm). Sturdily and comfortably fit, Pro Energy is perfect for you and the special one for any occasions. Each bracelet comes with a presentable gift box. Free USPS delivSatisfaction always guaranteed. Join our other happily energized customers!ery within 3 - 5 business days.