The main body is crafted from a polyester-cotton blended canvas that has been pre-shrunk via a water-wash process, ensuring resistance to deformation. It features a soft flannel lining with an interlayer filled with 3D hollow-fiber cotton. The ventilation window consists of a metal mesh edged with fabric, with the mesh surface treated with an anti-rust coating. The adjustable nylon shoulder straps are equipped with metal sliders and swivel snap hooks. The opening includes a drawstring closure finished with wooden bead toggles.



