Some items, like face masks show in stock quantities based on the amount of available materials I have on hand to make them. During COVID it has been difficult to find the same materials for masks twice. A lot of times once those materials are sold out they aren't restocked for extended times, if at all.The in stock quantity indicates that enough of the material selected is in stock here and it can be fulfilled. Once I run out of the cotton fabrics for masks, we can't guarantee that I will be able to restock it.