PremoBond Bobbins Bonded Polyester Anti-Wick Thread BPT Size 138U (Tex 135U) Black 72-pack combines bonded polyester continuous filament with twisted and plied yarn for strength 30% above industry standards. This black thread offers anti-wicking properties that resist moisture, along with mildew, UV, and fade resistance, making it ideal for outdoor sewing projects such as marine applications, upholstery, and heavy-duty industrial use. Pre-wound bobbins sized 138U (Tex 135U) in a convenient 72-pack provide reliable durability and consistent performance for upgrading patio decor and outdoor living spaces.