you get added ankle support and coverage

Dual durometer Ortholite footbed (installed)

no-glare snaps

Model Rubber Grip is straightforward

Safariland Model 6360 ALS/SLS Mid-Ride, Level III Retention Duty Holster for Glock 17 w/ Pressure Switch Light Finish:STX Tactical you get added ankle supportSafariland Model 6360 ALS SLS Mid Ride, Level III Retention Duty Holster for Glock 17 w Pressure Switch Light This holster with Automatic Locking System (ALS) builds on the foundation of the Self Locking System (SLS). It locks the weapon in all directions upon holstering, it's operable with the thumb, and the weapon can be drawn straight out of the holster with no twisting required. The mid ride belt loop allows the holster to ride close to the body.