SandnesGarn Perfect
Made for durability, Perfect is great for garments or socks that need to be machine friendly and stand up to wear-and-tear.
Their 50g put-up also makes them a good option when mixing and matching colours for heels and toes in heavy-weight socks.
If you are using Perfect by itself for a pair of adult socks, you may need three balls, depending on the size of foot, length of leg, and tension.
SandnesGarn has released a pattern book for thick socks using Perfect, that you can find here.