The Giordana Body Clone Knee Warmers perform under the radar. They look simple, but a closer inspection reveals how Giordana's tailors worked their magic to make sure that the Body Clone Knee Warmers conform to the body's shape, and that they stay in place -- two features that every warmer should offer. Vertically-stretching fabric over the kneecap accommodates the flex of the knee at the top of the pedal stroke; as such, these knee warmers don't rely on a heavy gripper system to keep them from slipping down.Dryarn fabric eliminates the chilling effect of sweating in cold weather by moving moisture away from your body. In terms of the amount of fabric used, the construction is denser in some areas and thinner in others. This variance provides compression support to muscles in areas where it's most beneficial, like around the calf, while reducing bulk in areas where freedom of movement might otherwise be restricted. The Giordana Body Clone Knee Warmers come in Black and in two sizes: Small/Medium and Large/X-Large. They are right- and left-knee specific, so the correct way to wear them is with the Giordana logo on the outside of the knee, reading from bottom to top.