Sleeveless Contrast Knot Button Vest Pomelo Fashion Kuro Black Katsuragi Workman Vest Kuro Knot Detail Vest Original Image by Kuro #3899875 Zerochan Anime Image Board Kuro Knot Vest ISAYA. The KURO KNOT VEST features a 1 4 diagonal opening, and is easy to be secured with two knot closures. COMPOSITION: Wool blend Suiting MAINTENANCE: Machine wash on a delicate or cold gentle cycle. Avoid tumble drying. Air dry flat to maintain shape. Iron on low heat or steam gently. Avoid direct high heat.