Permacore QE Quilters Edition TEX 30, 3,000 yard cones, combines strength and performance with ultra strong filament polyester thread on the inside, and cotton-like soft spun polyester on the outside. This permanent core fiber structure thread raises the bar for high thread performance: It's exceptionally strong, durable and abrasion resistant. Consistent stitches even in high speed multi directional applications. High level of color fastness for vibrant long lasting colors was after wash.