What cases does the clothing description refer to when it states in advance that 'it is not a defect'?

When you open multiple product descriptions from MOONDAL, similar sentences are attached one by one even if the materials differ. Explaining the terms first makes them easier to read. Mixed threads refers to different strands of yarn blended between fabrics, while wool clumping and yarn clumping refer to threads on the surface clumping together to form small beads.

For knitwear, a fragrance is added to these two. Both Light R-Neck Knit in Black and Summer Stitch Ted Raglan Knit in Gray Stripe state that mixed threads and wool clumping may occur, and clarify that the smell from the clothes originates from the fabric softener process, so it is not considered signs of wear or a defect^[1][2]. Moving to linen, sunlight follows instead of fragrance. Ines Sleeveless in Black notes that yarn clumping is not a defect, along with a caution that prolonged exposure to strong direct sunlight may cause fading^[3]. Fluid Layered Top in Black retains only the fading warning^[4], and Scallop Skirt in Black has a slightly different tone. Instead of pointing out specific phenomena, it only mentions that the material is somewhat vulnerable to external irritation, asking for care when wearing it^[5].

When beads form on the surface, pulling them out will cause threads in that area to come along, so it is safer to trim only the clumped parts using a lint remover or small scissors. Fragrance originating from fabric softener gradually fades when hung in a well-ventilated shaded area, and since fading is an irreversible change, preventing it involves avoiding hanging items in direct sunlight for long periods after washing.