Sticky, clearly labeled mobile filter bar: +106% filter use
Commentary byLiftArchiveOur analysis, not theirsEastpak redesigned its mobile filter bar and made it sticky, and filter use rose 106% with a 7% lift in click-through rate.
The bag brand ran the test with support from the Wingify Services team, and it was published as a VWO case study.
Before the change, only 5% of mobile visitors used the filters.
- Filter interaction: +106% compared with the control.
- Click-through rate: +7%, as shoppers found relevant products more easily.
- No sample size, duration or confidence level was shared.
The change
The mobile filter bar gets clear labels and sticks to the top of the screen.
Simplified mockup drawn by LiftArchive from the shared screenshots.
Control
On mobile product listing pages, the filter bar was easy to miss. Only 5% of mobile visitors interacted with it.
Variant
The filter bar was redesigned with clear, consistent labels and stuck to the top of the screen as shoppers scrolled.
Why it likely won
Our reading of the result, not the practitioner's claim.
- A sticky bar stays in reach while scrolling, so shoppers can narrow the list the moment it feels too long.
- Clear labels tell shoppers what each filter does, which makes tapping it feel safe.
- Eastpak's range is large, so filtering saves real effort on a small screen.
Caveats: No sample size, duration or significance was shared. The idea was developed with Wingify Services, the vendor that published the case study.
Who ran it
Eastpak ran this test for Eastpak and published the results (VWO case study). The numbers are theirs; the summary and commentary on this page are ours.
Read the original case study on Eastpak →
How to run this test on your store
- Hypothesis
- If we make the mobile filter bar sticky and give it clear labels, then more shoppers will filter and click into products, because filtering will be easy to find and understand.
- Primary metric
- Product click-through rate from listing pages
- Guardrails
- Conversion rate
- Filter usage rate
- Bounce rate on listing pages
- Who should test it
- Stores with large collections and lots of mobile traffic. Small catalogs with a few products per collection probably won't see much change.
Questions
Should filters be sticky on mobile?
For long product lists it is worth testing.
Eastpak's sticky, relabeled filter bar more than doubled filter use.
What should mobile filter labels say?
Use short, plain words shoppers already use, like size or colour, and keep them consistent across pages.
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