This is industrial sewing thread [Rejiron]. ○ Set of 5 colorful sewing threads Size #50 2 spools 　　　#60 3 spools Rejiron thread excels in stretchability, strength, and durability, and is particularly used for the following purposes. Main Uses ● Sewing knit fabrics and stretch materials Excellent elasticity, making it ideal for sportswear, innerwear, leotards, swimwear, etc. ● Underwear/Lingerie Can handle thin and stretchy fabrics. Seams will not pull. ● Cut and sewn items like T-shirts → Also compatible with stretchy cotton and synthetic fabrics. ● Repairing knit fabrics → Because it's a stretchy thread, repairs to tears and fraying will be less noticeable. [Bonus] ○ Bias tape 2 pieces ○ YKK zippers 20 pieces Thank you for your understanding of home storage.