Railcar Flight Trouser. A very comfortable 12 ounce American duck canvas in the traditional duck color. The design brings together a traditional workwear fabric, a modern fit, and classic styling to achieve a perfect pant. The duck canvas fabric is very breathable. Built in-house at the Railcar workshop in Monrovia, California for the highest quality with a two piece waistband, slanted trouser style pocketing, and constructed with a full felled inseam and outseam for strength.