Hello. Thank you for visiting my listing page. Korin Han-eri (collar) 2 pieces included "Attach with tape, no sewing required!" No needle or thread needed! This is a set of two Korin One-Touch Han-eri. Since adhesive tape is used for attachment, there is no need to sew it onto the Nagajuban (undershirt) with a needle and thread as before, making it easy to use. The tape is removable, making it convenient for carrying around in case of sudden outings! This Han-eri is a product that can be used from "September to June" except for midsummer. [Size] Width: 12.5cm Length: 100cm [Material] Surface: 100% Polyester Accessories: Protective tape *The adhesive strength will last even after washing if you apply the protective tape, allowing for repeated use. (It depends on the usage situation, but about 3 times is a guideline for normal washing.) Also, if the adhesive strength is lost, it can be used by sewing it on. For those who understand personal storage, thank you. Please refrain from purchasing if you are sensitive to such matters.