In an undated photo, L.L. Bean himself rocks the garment that would to come to be known as the Field Coat. L.L. Bean Made of army duck — a tough, water-resistant fabric — the garment boasted a feature ...

The tight weave of 10-ounce army duck canvas makes the Colorado Range Tent virtually water-repellent and fire-resistant. It's sturdy enough to function as a four-season shelter yet still breathable.