Designed for rail diameter 1.5" and up; Cable management; Hand positioning reference point; Soft point of contact for your rail on a hard surface; Reduces heat mirage from rail and barrel to keep your optics' visibility clear; Eliminates the need for gloves which rip or get lost often; The Rail-Rap is made in the USA with Berry Compliant fabrics; DuPont Kevlar TEX-80 thread; BPG proprietary DuPont Kevlar Bungee cord rated to 800 F