The appendix Series offers adjustable Passive retention in an exceedingly comfortable and concealable design. It features a unique, removable “concealment wing” which draws your firearm closer to your body to reduce printing while also ensuring all day wearability. The appendix Series also includes many other notable features, such as a detachable sweat guard and rotating belt clip, both being ambidextrous features: – adjustable Passive retention – detachable ambidextrous sweat guard – rotating ambidextrous belt clip – removable concealment wing (for right-handed users only) – protected sight channel – low profile design for concealability specifications: – fits: Smith & Wesson M&P shield 9mm & .40 Smith & Wesson M&P shield M2.0 9mm & .40.