I have been using skimmer socks for quite a while now and love them. I usually have to clean them weekly. I decided to try Knee Highs to see if they would work as well. I put a knee high on the skimmer basket about two weeks ago and it has collectedm practically NOTHING. I put a sock back on this morning and I can already see stuff in it this evening.
IMHO, knee highs do not work compared to skimmer socks!