[mothered]

Order #1: T-shirt
Order #2: Hoodie

Shouldn't a partial work for both? And the best for a T-Shirt.

What's the weight of each Item?

Probably not more than 150grams for the T-shirt.
Haven't bought the products yet...

150 grams Is a little too heavy for the partial method. That's provided an Investigation Is opened, and they cross-check the carrier's consignment.

Alternatively, you can opt for the wrong Item received.