Monterey Club Performance Ion Bracelet #BI01 100% Silica gel Unlike others, Monterey Club tested our each product is up to 1200- 1500 cc Welcome to check out our other ion product, # BI02, BI03, NI01 and NI02 Waterproof and stretchable silicone blends with ion Great item for enhance the body's healthiness and balance Monterey Club is an active lifestyle brand that has been offering quality-driven, high performance men and ladies apparel since 1987.