MSA's high quality protective V-Gard Cap with Fas-Trac Suspension  is designed for all-day comfort and easily adjusts.  It has a large knob to easily adjust fit, has a four-point webbed suspension that is very comfortable, adjustable dual nylon straps, perforated vinyl sweatband that cleans easily and is available in a vast array of colors. Comes instandard size of 6-1/2 to 8 inches. 

MSA Fas-Trac Suspension