.................................................stockings of course
The classic book for knitting authentic Scottish kilt hose (the proper term) is "Designs for Knitting Kilt Hose and Knickerbocker Stockings" by Lady Veronica Gainsford. It's been reissued by Schoolhouse Press as "Designs for Kilt Hose" Most kilt hose come to just below the knee and turn down with a decorative top. (you hold them on either with tied knit garters, or elastic ones)
For every day highland games, hiking and day wear, kilt hose are generally knit out of very stout wool in a colour to match your kilt ...some folks even have argyle hose that exactly replicates the sett of their tartan...I tried argyle once and threw the second sock half finished into a corner of the wardrobe from whence it was never seen again! LOL. For evening and more formal occasions (and for a pipe band too, generally), you always wear white hose. The above mentioned book has several very attractive cable patterns, lace patterns and other textured patterns for the tops, as well as some multicoloured ones, like thistles etc.
Here's a pair of dress hose knit in 100% natural coloured shetland wool that I devised. I'll be glad to share the pattern with anyone who wants it. (or is there a place to post patterns on here?)