Packin" Tee, a superior t-shirt for concealed weapons, is designed for versatility, comfort and style. You can now have your gun at your side without the restricting discomfort from other types of holsters used in carrying concealed weapons. No longer is there a need to wear jackets or other heavy outerwear to conceal your weapon; list weight shirts/clothing can be worn over the Packin" Tee the same as you would any other undershirt. The Packin" Tee is universal for use with either a right or left handed gun holster. Packin" Tee uses a heavy duty industrial strength hook and loop fastening system (comparable to Velcro®) for the side attachment pads. This material is used in many applications such as outdoor wear, medical industry, clothing, footwear, etc. The heavy duty hook and loop attachment pads on both sides offers the ability to use one side for the gun holster and the other side for the Packin" Tee accessories: the Wallet Accessory Pouch (which can also be used for cell phones, etc.) and the Magazine Pouch for carrying an additional magazine. Holster sizing: LARGE PISTOL HOLSTER POUCH FITS: Glock, Springfield XD, Taurus 24/7, All 1911 models, Sig Saur, Heckler & Koch HK, Hi Point, Taurus Millenium, all semi auto pistols 9mm or greater. SMALL PISTOL HOLSTER POUCH FITS: Most small frame pistols of 380, 32 & 25 cal. such as the Ruger LCP, Bersa Thunder, Kel-Tec P-32, Cobra FS, Walther PS. PLEASE NOTE: THE DESIGN OF THE PACKIN" TEE PISTOL HOLSTER ATTATCHMENT IS A CROSSDRAW HOLSTER TYPE. THE HOLSTER IS DESIGNED TO BE ON THE OPPOSITE SIDE OF YOUR BODY. IF YOU ARE RIGHT HANDED THEN ORDER A RIGHT HANDED PISTOL HOLSTER ATTACHMENT, AND YOU WILL PLACE THE HOLSTER ON YOUR LEFT SIDE OF YOUR BODY AND VISE VERSA.