. Floriani 40 weight polyester embroidery thread is a high sheen, high tensile strength, lubricated embroidery thread which results in excellent production and adds magnificent color and luster to your finished products. Thanks to Floriani's colorfast guarantee, you will never have to worry about your thread color fading. Each spool holds 1093 yards of 100% polyester thread Floriani strives to produce the highest quality of thread, so all manufacturing process phases are performed in-house to ensure quality. Each lot of new raw material is inspected and tested to ensure that the quality of materials going into production is sufficient for producing a quality product. The same is true for the finished thread. No environmentally harmful products or carcinogens are utilized in production. All water used to dye the thread is properly treated to separate dye stuff from the water used in production. The inert sandy, grit material which remains is used as a land fill substance to help fight erosion along the coastlines. The use of certain dyes may change in order to adhere to environmental safety regulations When ironing, use a low-temperature setting and cover the embroidery with a pressing cloth or press from the backside. Floriani thread is washable or dry cleanable. Use caution when using a washer and dryer so as not to expose your stitches to open zippers or buttons, as this may cause a snag. Use a mild detergent and never leave embroidered articles soaking in water or a pile of wet garments