What a smart set for a smart man! These are easy knit and really, its just stocking stitch and ribbing, so if you're looking to dive into garment making for yourself or your man I'd say this is a fun place to start. Not much I can say about these because they're just going to go with everything - everyone needs staples like these.
This has been knitted in King Cole Majestic DK, a wool/acrylic blend that will keep you warm whilst being hard wearing. However, something like this will look good in any DK yarn.