Free shipping doesn't have to be all-or-nothing: sometimes only certain products deserve it — light items that cost nothing to add to a parcel, or a promoted collection that should tempt people into the cart. Group such products — or an entire category — with a shipping class, and the rules below do the rest. Product-class conditions are a Pro edition feature.
Scenario A Specific products ship free
T-Shirts travel free, whatever else is in the cart pays the regular rate. The first rule matches the T-Shirts and charges nothing for them; the second is its mirror — everything but T-Shirts — and charges the regular rate.
Example #1
Cart: T-Shirt, Hoodie.
Result: the T-Shirt ships free, the Hoodie triggers the $5.00 rate — $5.00 total.
Example #2
Cart: two T-Shirts.
Result: nothing left after the free rule — shipping is free.
Scenario B A specific product unlocks free shipping
Here the promoted product doesn't just ship free itself — its presence makes the entire order ship free. The rule matches carts containing a Hoodie, charges nothing, and stops the rule processing, so the paid rule below never fires. Unlike the other scenarios, this one can't be built from plain conditions: making one product's presence affect the whole order is exactly what the STOP modifier in the Mod column is for.
Example #1
Cart: Hoodie, three T-Shirts.
Result: a Hoodie is present — the whole order ships free.
Example #2
Cart: three T-Shirts.
Result: no Hoodie — the regular $5.00 rate applies.
Scenario C Free shipping for a group over its own subtotal
Conditions apply to the matched products only, so the Value column here reads the subtotal of the Accessories in the cart, not the whole order: Accessories ship free once they total $50.00 on their own. The DROP modifier then takes the free Accessories out of the calculation, leaving the rest of the cart to the paid rule.
Example #1
Cart: $60 of Accessories, a Hoodie.
Result: the Accessories ship free; the Hoodie pays $5.00.
Example #2
Cart: $30 of Accessories, a Hoodie.
Result: the threshold isn't met, the free rule doesn't match — everything pays $5.00.
The mirror problem — free shipping for everything except certain products — is covered in the exclude items from free shipping recipe.