It looks like a high quality card holder and the band seems to be very durable. I only have 2 cards now, but more could easily fit.
Royce Leather Mens Business Green Men's Accessories in Wallets, Card Cases & Money Organizers
62 Review
Crabby Wallet Minimalist Pocket Polyester Men's Accessories in Wallets, Card Cases & Money Organizers
59 Review
Credit Card Holder with Chain Cover
70 Review
Wally Micro Reversible Wallet Pull Tab Men's Accessories and Wallets, Card Cases & Money Organizers
53 Review