Extra Strong Knee Pads Set - Measurements: 22x24 cm. -Knee pads with rigid support area made of extra-strong polypropylene. -Filled with high-density foam with polyester padding for maximum protection and comfort. -Adjustable elastic straps with velcro closure, adjusting to your needs. -Specially designed for use in construction, carpentry, mechanics, gardening, air conditioning, floor installation, etc.