Cortex's Speeder loom attachment improves warp yarn properties and behavior. The Speeder includes a permanent, one piece heating beam that retracts automatically and synchronizes with the warp. The Speeder acts on the warp in its horizontal movement between back rest roller and drop wires. It is particularly suitable for thermoplastic yarns and for applications that combine strong mechanical constraints with high quality demands, such as air bags, sails, and filters.