Uncle Mike's Horizontal Pro Pak Shoulder Holster, Size 1, Fits Medium Auto With 4 Barrel, Ambidextrous, Black 77010 For everyday wear" their Pro-Pak holsters are the ultimate. They're ergonomically designed" simple" lightweight and super tough. Pro-Pak holsters lie flat against your body" making them an excellent choice for use under jackets. They're constructed of an extra-thin laminate with a Kodra nylon outer shell. The smooth nylon lining protects your gun's finish and aids in drawing and reholstering.