Talk:Industrial Sewing Machine/@comment-35923789-20180619050545

This machine allows you to upgrade clothing once the mission to build it has been completed.

This ability to upgrade seems to be dependent on specific factors. I was unable to upgrade any lower level hat and pants to level 40  till I obtained them as rewards during the mission loking for the computer, and I'd already hit level 40 when I did that, eliminating the possibility that they're merely dependent on the level of your character. The shirt wasn't unlocked till I won it as loot in Ingall's Mine level 3. I imagine the level 35 variants become available when you win their counterparts as loot or hit a high enough character level to have the clothing shop restock their counterparts, which was around level 40 for me I believe.

In order to upgrade them, you have to have them in your inventory, not on your character. You also have to have the fancy cloth required that you get frome elite creatures and the metal pig of Ingall's mine level 2.