You need roots sweat pants.

I'm on my second pair of Roots sweatpants and all I have to say is I absolutly love them! They are the warmest pair of sweatpants you can own, yes they're on the more pricey side but a great investment. The quality is extrodainary, and I haven't had any holes after 2 year so I bought a second pair at Christmas.

Nice luxury item

The sweatpants are a great piece of apparel, just unsure you follow washing instructions to keep the quality and feel to its best. If it's improperly taken care of the softness as well as how long the product will last greatly diminishes.
Over all great product you pay for the quality, so treat with care :)