A mix of beeswax, neatsfoot and natural oil that I mix myself. A bit weird I know, but it's great stuff. It will restore and protect leather and keep your veg-tan wallets, belts, lanyards supple and healthy. Not really suitable for matt or unfinished leathers such as Pueblo or Nofin until they are naturally worn in.
It's a small 15ml tin but it goes a long way. I put the stickers on the tins myself so the chances of them being in the centre are minimal :-)