I carry my sd40 concealed in a uncle mikes nylon super slide paddle type holster number15. I loop my belt on the outside of the holster to give me good concealment. These holster are very adjustable, it can also be adjusted to carry a S&W 40 shield, Ruger P95, and many other firearms. They are also very cheap to buy, I found my holster on line for less than $20.00.