How femtis made its Shopify store 31% faster with Speed Kit

Published on November 11, 2026

  • Fashion
  • Europe
  • Shopify
femtis storefront
femtis

31%

Faster median LCP since the rollout

52%

Faster Time to First Byte

77%

Of next pages preloaded before the click

“For a smaller brand like femtis, every bit of load time counts, especially on mobile. Speed Kit made the shop noticeably faster without adding work for our team.”
— Kevin Foitzik, Group Head of E-Commerce & IT, SNOCKS Group

Introduction

femtis makes period underwear for light to heavy days, for girls from their first period through pregnancy to menopause. Its products are certified to OEKO-TEX Standard 100 and made without silver chloride, PFAS or biocides. More than 300,000 customers trust femtis, which is based in Mannheim, sells through femtis.de and femtis.ch and is part of the SNOCKS Group.

Challenge

femtis is the smallest store in the SNOCKS Group, with around 150,000 page views a month. When the group looked at its load times in early 2026, it saw clear room for improvement. The shop runs its own A/B tests and a size advisor on the product pages, and the same three developers look after every brand in the group.

Solution

femtis was added to the SNOCKS group contract for Speed Kit. Speed Kit runs on top of the existing Shopify store and its theme, without replatforming. The developers installed the Speed Kit app and enabled its app embed, and Speed Kit took care of the rest. Speed Kit is now live for all visitors, and the results below compare the same pages before and after the rollout.

Results

Performance Improvements — Largest Contentful Paint (LCP): Since the rollout, the main content on product, collection and home pages reaches the customer 31% faster at the median, about two thirds of a second sooner. Product pages load 49% faster, collection pages 20% and the homepage 5%. On mobile, where most femtis customers shop, pages load 32% faster, and Time to First Byte is 52% faster.

Median Largest Contentful Paint on femtis.de before and after Speed Kit: 31% faster overall, 49% on product pages, 20% on collection pages and 5% on the homepage. Time to First Byte 52% and mobile LCP 32% faster.
Speed Kit real-user monitoring on femtis.de, medians on product, collection and home pages, before and after the rollout of Speed Kit.

Predictive Preloading Coverage: 77% of next pages are cached before the users visit them, and 19% of next pages are prerendered in the background, so many clicks open a page that is already complete.

Instant experience funnel on femtis.de: 77% of next pages are cached before the users visit them, and 19% of next pages are prerendered in the background.
How much of the femtis shopping journey Speed Kit prepares ahead of the click, since the rollout.

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