Pocket Socks Mens Athletic Travel Over the Calf Knit Socks with Hidden Zipper Pocket for Passport, ID, Cash, One Size, 1 Pair, Black at Amazon Men's Clothing store
Ravelry: Hidden Treasure Pocket Socks pattern by Cat Bordhi
Amazon.com: Pocket Socks Unisex - Zip Security Pocket for accessories, One Size Fits Most - 2 Pack Bundle White Sport Stripe (S/M) (9-11) : Clothing, Shoes & Jewelry
Pocket Socks | Best Brother Ever, Mens Pocket Socks®