The Gütermann Ora 1000m cerulean blue 534 798231 sewing thread is a versatile polyester thread designed to provide uniform, break-free seams in high-volume work. Its 1000-meter cone presentation is extremely cost-effective for use in virtual or overlock machines. The cerulean blue 534 shade offers a very attractive medium bluish sheen, perfect for casual wear, uniforms, and cotton fabrics.