This is an iron-on, 3-layer compatible seam tape. 【Size】■ Width: Approximately 20mm ■ Length: 4m 【Color】■ Gray ■ Includes a simple instruction manual. This 3-layer compatible seam tape is made of tricot/warp knit material, ideal for repairing tents, tarps, rainwear, cold weather gear, etc., made of 3-layer materials such as Gore-Tex. It is thicker and has a stronger bond than regular seam tape using PU coating. By using an iron for heat sealing, you can achieve a clean finish with easy application. 【How to Use】 1. Before application, thoroughly clean the surface to be treated and ensure it is completely dry. 2. Use a thin cloth (handkerchief) or silicone paper (kitchen paper) as a pressing cloth over the seam tape. 3. Set the iron to medium heat as a guideline, and adjust the temperature up or down while checking the adhesion. 【Precautions】 ※ Avoid using on polyethylene cloths such as blue sheets, as the fabric may melt due to heat. ※ Sufficient adhesion may not be achieved depending on the material.