# Sticky Sort and Filter bar on mobile category pages: +53% filter use

- Outcome: Won
- Page type: Collection page (Ecommerce)
- Elements: Filters, sorting & site search
- Test run by: [VWO](https://liftarchive.com/practitioners/vwo/)
- Commentary by: LiftArchive (our analysis, not theirs)
- Original source: https://wingify.com/success-stories/panduro/
- Page: https://liftarchive.com/test/panduro-mobile-sticky-sort-filter-bar/

Fixing a Sort and Filter bar under the top navigation on mobile category pages raised filter interaction by 53%. Wingify Services ran this test for Panduro, a hobby and craft retailer, and it was published as a VWO case study. The test ran for 12 days and was reported at 100% confidence.

## Result

**+53% filter use**

- Filter interaction: +53%, at a reported 100% confidence level.
- The variant was rolled out to all mobile traffic.
- No sales, add-to-cart or conversion figures were shared, so the effect on revenue is unknown.

## Control

Mobile category pages had filters that scrolled away with the page instead of staying at the top. Few shoppers used them.

## Variant

Filters were split into two parts, Sort and category filters, and fixed just below the top navigation. They were also restyled to look cleaner and easier to tap.

## Why it likely won (our reading)

- A fixed bar keeps filters in reach no matter how far a shopper scrolls, which matters on long mobile grids.
- Splitting Sort from Filter gives two clear, separate actions instead of one crowded control.
- Craft supplies come in many colors, sizes and types, so narrowing a big range is useful to shoppers.

## Caveats

Filter use is an engagement metric; the case study gives no figure for purchases or revenue. The test ran 12 days, no sample size was shared, and the result is vendor-reported.

## How to run this test

- Hypothesis: If we fix separate Sort and Filter buttons under the mobile header on category pages, then more shoppers will narrow the range and reach the right product because the controls are always in view.
- Primary metric: Ecommerce conversion rate from mobile category pages
- Guardrail: Filter interaction rate
- Guardrail: Product page click-through from listings
- Guardrail: Bounce rate on category pages
- Who should test it: Mobile-heavy stores with large categories where shoppers need to narrow by size, color or type. Stores with small catalogs or short category pages probably won't see much.

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Credit: VWO ran this test and owns the result. Summary and commentary by LiftArchive (https://liftarchive.com/test/panduro-mobile-sticky-sort-filter-bar/).
Usage: Free to use, quote and build on, with credit and a link: name the practitioner or organization that ran the test and link to its LiftArchive page. The results belong to the practitioners who ran and shared them; the summaries and commentary are LiftArchive's.