Best slim wallet designs from Conceal Plus. A slim wallet is compact and provides easy access to your most-used credit cards. All Conceal Plus Card Blocrs are backed by our 2 Year 100% Satisfaction Risk-Free Money Guarantee. There are many great slim wallets on the market, and the best one for you will depend on your individual needs and preferences. Here are some of the most popular and highly-rated slim wallets available. When choosing a slim wallet, consider factors such as materials, capacity, and overall design. The best slim wallet is one that meets your needs in terms of functionality and style.