Winter hiking pants

Winter hiking pants- No idea who makes these but will say they will keep you warm purchased to hike in -8 to -10 degree weather. No base layer just these and WAS NEVER COLD. I can not say enough about them. Purchased on Amazon 2 years ago. Outside like a neoprene but not but thick and inside like a fleece only not bulky. Not got. Did not sweat and did not get cold. Very comfortable pant.