Unlike toasty winter-weight knee socks, knee high pantyhose and trouser socks are more like stockings. They're typically constructed seamlessly from soft nylon or microfibers. Opaque knee-highs are an ideal choice under trousers or long skirts when you want a put-together look without wearing tights or pantyhose. Look for many fashion colors, like graphite, navy and espresso, as well as nudes and black. Most opaque knee highs have a ribbed band around the leg to keep them up. Instead of the tight binding and digging of older styles, today's knee-highs feature bands designed to feel comfortable. The nylon, spandex and microfiber combinations of most knee highs means they're easy to care for and durable.