I bought this new last year and used it about 20 times over two seasons. There is a slight fraying of the fabric on the inside of the right knee, but it does not affect use. T6500-3DX "Manufacturer's Product Description" These tights, designed for 5°C weather, use Windbreak®, a material that combines windproof and heat-retaining properties. They feature a quick bib (international patent No. 5622983) with a reduced fabric overlap at the zipper for improved comfort. The tights and tank top sections can be easily separated, making them easy to take off and on for restroom breaks. The pad uses the latest "3D-X" model, which combines a higher fit that integrates with the body and soft cushioning. ・Windbreak with high windproof properties on the front ・Bib specifications with less compression on the abdomen ・Hem zippers for easy on and off