Michael Babcock talks about his experience using the Slinger or Slinger Slim lanyard-style product. He mentions that he prefers the Slinger Slim as it is thinner and he can carry his cards in a separate wallet.
The Slinger has a see-through wallet that can hold four cards. The Slinger also has adjustable straps and if you order from their website, you get an extra strap for more flexibility.
Michael explains how he used the Slinger Slim to solve a problem while traveling independently through Las Vegas Airport. With the help of Aira, he was able to navigate the airport with ease. He recommends buying a separate case and sticking the Slinger onto it for convenience.