A custom solution that makes it easy for customers to buy multiple seat configurations or product variants without repeating the add-to-cart process.
The Challenge
A client who sells car accessories approached me with a very specific problem.
Their product has two options:
- Color → Black, Brown, Green, etc.
- Seat Configuration → First row seat, Second row seat, Boot seat.
By default, Shopify only allows customers to pick one color and one configuration per product. For example, if someone wanted Black seat covers for all three rows of their car, they’d need to repeat the process three times — select color + configuration, add to cart, then start again.
This creates friction for customers and makes bulk ordering inconvenient, especially for products like car accessories, furniture sets, uniforms, or anything where multiple configurations are purchased together.
The client’s request:
- Keep Color as a radio button (so only one color can be chosen).
- Change Seat Configuration to checkboxes (so multiple seat rows can be selected at once).
- When hitting Add to Cart, automatically add all chosen seat rows with the selected color into the cart in a single click.
The Solution
I customized the Shopify Dawn theme to achieve this:
- Color as Radio Buttons: Customers pick a single color (e.g., Black).
- Seat Configuration as Checkboxes: Customers check all the seat rows they need covers for.
- Enhanced Add-to-Cart Logic: On clicking “Add to Cart”, Shopify instantly generates all combinations (e.g., Black + First Row, Black + Second Row, Black + Boot Seat) and adds them to the cart at once.
The Result
✅ A frictionless buying experience for customers.
✅ Instead of 3–4 steps, they finish in just one click.
✅ Higher conversion rate (less chance of cart abandonment).
✅ A customer-friendly solution that directly matches how people shop in real life (one car, one color, multiple seat rows).
Where Else This Is Useful
Although this example was for car seat covers, the same approach is powerful for many industries:
- Furniture → Choose fabric color once, then select multiple furniture pieces (sofa, chair, ottoman) to add in one go.
- Electronics → Pick a device color, then check multiple accessories (charger, case, headphones) at once.
- Sports Gear → Select jersey color, then choose multiple player numbers or kit sizes together.
- Food & Beverages → Choose one flavor, then select multiple pack sizes (6-pack, 12-pack, 24-pack).