I use three separate wallets:

1. At home: Normal 4-slot All-ett "original wallet" with all the cards I need in normal life.

2. Travel: All-ett passport/traveler wallet with frequent flyer etc cards and passport already in it. When going on a trip, I just transfer some credit cards and drivers license to this wallet and am ready to go.

3. Going out when traveling: I use a All-ett "international wallet" (small, 2 card slots) with a folded copy of passport already in it. I put some cash, one or two CCs, business cards and hotel key card in when going out, no need to worry about everything being stolen. Fits in pants pocket in hot climates...

All-ett ships at low cost in normal envelopes so no problem buying them directly from All-ett to Europe.

I also carry a very small and thin USB memory stick (currently Sony "8GB Micro Vault Tiny") in my wallet, taped to a piece of cardboard. Stays clean and with me at all times.

Add to this a Scottevest tropical travel vest and an Air Boss bag for pretty easy carryon-only travel ;-)