This is for a 3 pack of Bella + Canvas black, double-ply face masks. These masks are made of jersey fabric, 52% Airlume Cotton/48% Polyester. These are soft fabric, reusable and washable. These normally sell for $8 each, selling for $4 for each pack of three.
Multiple sizes are available, small/medium (kids and women fit usually), and medium/large (men and larger faces).