While Rag & Bone’s Miramar jeans are a dead ringer for denim, they’re just as soft as sweatpants — and right now, select colors are on sale for 30% off at Nordstrom.

The hottest jeans of the season aren’t even denim. Sweatpant jeans have taken the internet by storm, as fashionistas fawn over the pants that provide both comfort and style. After the pricey Rag ...