By the narvik tech+ 3/4 Tights here:
https://www.norrona.com/en-GB/Products/5333-13/1260/narvik-tech-34-tights-w/
Comfortable, warm technical underwear made for skiing and snowboarding. The cut is ¾ long so it will stop above the boots. The elastic in the waist is clean and made not to collect moisture. The brushed polyester tech+ fabric has a Polygiene® treatment for less smell, and is very comfortable and warm on the skin, with good elasticity.