Du/er is redesigning the winter jean from the yarn up

If you live in a place with a cold winter, dressing for work in the middle of January is more complicated than it seems. You want to wear your jeans to the office, but ordinary denim doesn’t provide enough warmth on freezing day. The available solutions aren’t great. You could wear thermal leggings under your jeans, but you’ll start sweating the minute you leave the sidewalk to enter your heated building. Fleece-lined jeans are often stiff and bulky. [Photo: Courtesy Du/er] Du/er, a decade-old Canadian brand, has been working on a better alternative. Today it launches Tech Fleece, a fabric that weaves fleece and denim together at the yarn level instead of attaching a separate liner inside a jean. On the exterior, the pants look and feel like a regular pair of jeans. But on the inside, the part that rubs against your skin feels soft and fleecy, while holding warmth. Du/er’s design team also focused on making the fabric stretchy, breathable, and water repellent, so it keeps you dry in rainy weather. They are releasing it in two styles, a men’s jean and a women’s utility pant, which are both available online and in the brand’s stores for $159. Jeans for bicyclists Gary Lenett, Du/er’…