ZoneTwelve Satin Undercover Money Belt Premium quality satin material gives you an unsurpassed level of comfort. Satin feels so natural that you can wear it all day without noticing you're wearing anything at all. Super slim yet just large enough to carry your passport, money, credit cards. Will not irritate your skin or cause a rash like normal polyester or nylon. Lightweight, slim and flexible under clothing making it unnoticeable, giving you superior protection and peace of mind.