Color radios prevent comparison; AND between colors makes a single variant impossible.
Filters: OR within an attribute, AND across attributes
Brown or black can both be acceptable colors. Size L and stock status must still apply to the same variant.
Research context: Baymard · Combining filter values ↗
Use multiple selection for alternative values. Explain technical filters where shoppers may expect different logic.
Try the pattern
Task and expected result
- 01
Select brown and black: show the union of those colors.
- 02
Select L and in stock: no item may match through different variants.
- 03
Remove one color: retain size and the remaining color.
How to investigate value
Observe whether participants find an item meeting every need, not just how many cards they click. For measurement: relevant selections per eligible search/list visitor.
Watch for side effects
Zero results, false variant matches, lost list context and slow filters. More product-page visits are not necessarily better.
This is a proposed investigation, not a measured result. Choose one hypothesis and define the audience before testing.
Build a measurement plan for this concept ↗