This spider silk, naturally made by the spinning gland of the spider, has incredible strength and is highly extensible. Researchers even say that its quality is on-par or even surpasses Kevlar. This silk is made of a protein called Spidroin. Spidroin connects to each other to make a polypeptide chain similarly to other proteins by connecting from the C to N terminals. Protein is one of the build blocks of our system and for them, its to create intricate webs to catch prey and provide a home. This silk is sought after by clothing companies, textile, even the aviation industry for its quality and potential use.