LaCrosseMountain Pass Insulated Vest Hi-Vis is 100% waterproof heavy-duty 300D polyester canvas outer fabric. LaCrosse Precision Fit Technology increases range of motion and comfort, and ability to layer other garments underneath. The external chest radio pocket, internal chest security pocket and lower hand warmer pockets are sure to please. The lining is polyester fleece quilted to 150-gram insulation ANSI 107-2004 CLASS II certified and ANSI 207-2006 certified.