It all began with the Russ Crewneck, our take on your favorite sweatshirt, which featured detailing and fabrics unlike any sweatshirt you've ever worn. We've taken that same concept to these, featuring a jogger-style leg and articulated knee for added comfort. Combine that with the fabric, which made with a French Terry knit using the perfect blend of Peruvian Pima Cotton and stretch and you have a pair of sweatpants you won't be taking off any time soon.