The Power Stretch Bib is a lightweight, stretch-fit, warm & durable fleece trouser & bib. Polartec Power Stretch Pro with a durable nylon outer face fabric is used to make this practical & close fitting bib. The Power Stretch Bib is an ideal one piece layering system for use when winter mountaineering, for Alpine style routes or for polar exploration as the bib design eliminates cold spots between tops & bottoms & saves weight. A long front zip makes getting the bib on & off easy & is essential for venting & the 'rainbow' seat zip is a welcome addition for toilet breaks!