The DX4 insulated winter trousers with bib are made from durable 300D Oxford Stretch polyester fabric. With a zip off function at the back, the bib can be removed completely to turn it into trousers which adds to its overall versatility. This style features pre-bent top loading adjustable knee pad pockets, generously sized front pockets and multi-functional zip thigh pockets offers secure storage of phone, pens, and tools.