I've tried quite a few IWB and found the hybrid holster to be the most comfortable. I prefer whitehatholsters.com. They have kydex for the SP-01/P-01 for when I carried my P-01. I've since traded up for a DW ECO and I'm missing the P-01 since it fit so snugly compared to the officer size 1911. I've got a horsehair backing with the carbon fiber kydex, if you're interested. Otherwise, I'm waiting for the P-01 Omega to make it to our shores and I'll buy it just for that holster!