The Buffway Slim minimalist wallet, which shows >89,000 Amazon reviews and a 4.6/5 rating, was used for several weeks: it fits roughly eight cards, folded cash and has an ID window, but the reviewer found the material plasticky and likely bonded/genuine leather rather than full-grain. He expects limited durability (under ~1 year), recommends a ~$50 full-grain alternative, and suggests the synthetic model if buying.