How can I differentiate Online products vs "Offline" products?

I'm helping redesign a website that has some products that can be purchased online and some which can only be purchased offline in physical stores.

Both the products you can buy and can't buy need to be shown on the site, but how can I present both in a way that's not confusing?

We could have a tab with 'Products' and one with 'Online shop' but I'm not sure this is very clear. Alternatively, we could put the products within the shop and just note that these cannot be brought online but this can cause frustration and is misleading.