Compression Socks & Sleeves
“Do they work?” is commonly the question.
A “yes” or a “no” answer depends on what the individual means by “work”.
Sleeves and socks both have their uses, but the usefulness may depend on the situation.
I’ve used compression sleeves/socks during runs if my calves are a bit sore. The compression may reduce calf oscillation (movement) and help with any potential injury or just soreness.
Compression may not have much research behind its use during racing as a performance enhancer, but many people do find such gear comfortable, and being comfortable is almost always going to make you quicker. It is important to consider that the socks may be a bit warm in hot races.
The best option is to wear socks (not sleeves) as a recovery tool, which I often do for the rest of the day after a morning hard/long run.