PremoBond Bobbins Bonded Polyester Anti-Wick Thread BPT Size 138U (Tex 135U) White 72-pack features continuous filament bonded polyester with twisted and plied yarn construction, offering high strength and durability for outdoor and industrial sewing projects. Designed with anti-wick properties, this white thread resists mildew and UV exposure, making it ideal for marine sewing, upholstery, awnings, tarps, and covers. The pre-wound bobbins ensure ease of use, supporting lasting fade resistance and performance in demanding environments. The size 138U (Tex 135U) provides reliable stitching strength, suitable for enhancing patio décor and outdoor living essentials.