Hey @snkrs in this scenario you’ll likely be assembling bundles to sell on Shopify. There are a variety of apps that support this, though most apps will require you to pre-make the bundles, which may be a selection criterion that you’ll have to chat with the bundle apps providers to figure out if they offer it.
Bundles Apps on the Shopify App Store
The alternative option would be to set up your own private app that has restrictions on each individual product to show all the options (laces/shoe style), but restrict checkout until they made a selection in each category (shoe with a lace). This is the route I would personally take, it’ll be a lighter app to do this specific function and thus remove some of the extra features many of the existing bundle apps provide.
For handling the inventory on each of your bundles, depending on how many orders you are creating, it might be beneficial to have a system that will coordinate the pick and pack of your bundles into batches to make it efficient here. For a look at handling this process within a Shopify inventory system take a look here, and check out SKUSavvy.com