Fine ribbed knit mesh, loose and open enough to see light and skin tone through it — this is a layering piece, not a top to wear on its own. Hand wash cold to protect the open stitch structure, and check for jewellery or rough surfaces nearby before washing, since the open weave snags more easily than a solid knit. A machine cycle can snag or stretch the mesh even inside a wash bag, so hand washing is the safer option. Lay flat to dry, away from anything the mesh could catch on.