Youth size small black knee pads from Coolomg in gently used condition.

From Amazon:

COOLOMG knee pads are made from a mixed elastic compression material with a non-slip design. They provide a snug and comfortable fit, similar to a second skin.
COOLOMG Youth Knee Pads come with extra-long leg sleeves that provide power compression. This compression helps to stabilize the muscles and offers additional protection against injuries and scratches.
These knee pads feature a graded compression structure that improves blood flow to the legs. This design helps accelerate blood flow back to the heart, enhancing overall circulation. The fit tensile strength of our knee pads ensures they can be used for various activities such as basketball, baseball, football, and outdoor and indoor sports.
Our knee pads have a moisture-wicking material that keeps you dry and comfortable. It regulates temperature, keeping you warm in the cold and cool in the heat.