Choose neutral detergents and avoid using alkaline ones as much as possible. Alkaline detergents can cause certain dyes to hydrolyze and detach from clothing, Dark colored products may have some floating color during the first few washings, which is a normal phenomenon. A little salt can be added to fix the color
Item description from the seller
Four-sided elastic men's shirt long-sleeved solid color casual trade anti-wrinkle men's European size shirt