Sweatshirts Unisex Jumpers, Mens Sweats Basic Crew Neck Set in Sleeve Sweatshirts S - XXL

How should this sweatshirts be washed, with dark colours, or white colours, and what type of washing detergent, biological, or non biological etc?

Will the xxl fit a 46-48 chest

Are the sizes stated for women as well as men

What is the fabric?