A seven-layer, lightweight TPU Inner Tube designed for performance and space efficiency. High-grade micrometer-thick TPU is used across seven sealed layers to enhance airtightness and durability. The tubes are colorless to ensure top material quality and prevent air retention issues from dye-related surface imperfections. Each Conti TPU tube undergoes post-production quality checks. The valve shaft base is slightly conical for improved rim fit and reduced movement, and the valve is internally threaded for use with extensions or a replacement valve core.