The main body is made of brushed polyester Oxford fabric, with a soft fleece lining and an EPE (expanded polyethylene) foam middle layer. The ventilation window consists of a metal mesh with bound edges. The shoulder strap is an adjustable webbing equipped with a metal slider buckle and a swivel snap hook. The opening uses a drawstring closure made of reflective polyester cord. The base includes a removable, rigid insert board. It is constructed with double-needle straight stitching.



