Only real wool keeps you warm! Everything you knit with it will reliably keep you warm. Here are my suggestions for you.
I hope you enjoy these knitting projects.
Warm regards from Ina
Cardigan with shawl collar
It is knitted in one piece as a top-down raglan. The eye-catchers are the wide shawl collar, the belt, and the pockets. The length goes over the bottom, which elongates the figure and, of course, also keeps you warm lower down. The color gradients come straight from the ball of yarn.
One-Step Felt Booties
They are guaranteed to keep your feet warm. They are knitted in one piece and felted in the washing machine. You can make them in all sizes.
Wrist Warmers with decorative cable
Every woman will love them. They have a pretty cable pattern on top, and the inside is knitted in stockinette stitch. The incorporated thumb gusset ensures a perfect fit. Since you only need 50 or 60 g (= 2 sizes), they also make a lovely Christmas gift.