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theunderdays.com website review

Visit site (opens in a new tab)Reviewed 8 November 202634 issues · 85 checks

This review found 34 issues worth fixing on theunderdays.com, 16 of them high impact, across 85 checks. The most urgent: reduce unused JavaScript. Your full playbook turns these into prioritised fixes alongside reviews, competitors and channels.

  1. Homepage
  2. Phone render
  3. Links and pages
  4. Google PageSpeed

Google PageSpeed Insights (opens in a new tab), mobile

Real-visitor load time (LCP)75th percentile, phones
1.8 s1.5 sMay 16Oct 311.7 s
Show as table
DateReal-visitor load time (LCP)
May 16, 20261.7 s
May 23, 20261.7 s
May 30, 20261.7 s
Jun 6, 20261.7 s
Jun 13, 20261.7 s
Jun 20, 20261.7 s
Jun 27, 20261.7 s
Jul 4, 20261.7 s
Jul 11, 20261.7 s
Jul 18, 20261.7 s
Jul 25, 20261.6 s
Aug 1, 20261.6 s
Aug 8, 20261.6 s
Aug 15, 20261.6 s
Aug 22, 20261.6 s
Aug 29, 20261.6 s
Sep 5, 20261.6 s
Sep 12, 20261.6 s
Sep 19, 20261.6 s
Sep 26, 20261.6 s
Oct 3, 20261.6 s
Oct 10, 20261.6 s
Oct 17, 20261.6 s
Oct 24, 20261.7 s
Oct 31, 20261.7 s
Real-visitor tap response (INP)75th percentile, phones
145 ms126 msMay 16Oct 31136 ms
Show as table
DateReal-visitor tap response (INP)
May 16, 2026128 ms
May 23, 2026129 ms
May 30, 2026130 ms
Jun 6, 2026135 ms
Jun 13, 2026137 ms
Jun 20, 2026137 ms
Jun 27, 2026141 ms
Jul 4, 2026141 ms
Jul 11, 2026143 ms
Jul 18, 2026141 ms
Jul 25, 2026137 ms
Aug 1, 2026137 ms
Aug 8, 2026137 ms
Aug 15, 2026137 ms
Aug 22, 2026139 ms
Aug 29, 2026138 ms
Sep 5, 2026138 ms
Sep 12, 2026139 ms
Sep 19, 2026137 ms
Sep 26, 2026139 ms
Oct 3, 2026141 ms
Oct 10, 2026143 ms
Oct 17, 2026140 ms
Oct 24, 2026137 ms
Oct 31, 2026136 ms

Chrome UX Report (opens in a new tab): real Chrome visitors over rolling 28-day periods.

One score from every part of this review. How it works

Full-page screenshot of theunderdays.com (phone) rendered by Google PageSpeed Insights

How it loaded on a phone

  1. theunderdays.com at 0.4 s0.4 s
  2. theunderdays.com at 0.8 s0.8 s
  3. theunderdays.com at 1.1 s1.1 s
  4. theunderdays.com at 1.5 s1.5 s
  5. theunderdays.com at 1.9 s1.9 s
  6. theunderdays.com at 2.3 s2.3 s
  7. theunderdays.com at 2.6 s2.6 s
  8. theunderdays.com at 3.0 s3.0 s

Speed

10 to fix41
  • Reduce unused JavaScript

    2.5 s · 757 KiB

    About 757 KiB of JavaScript is downloaded but never used on this page. Google estimates it would make the page about 2.5 s faster on a phone.

  • Use efficient cache lifetimes

    1.4 s · 527 KiB

    32 files are served with short cache lifetimes, so returning visitors download them again (527 KiB).

  • Render-blocking requests

    1.1 s

    14 files block the first paint until they finish downloading. Deferring or inlining them could save about 1.1 s.

  • Mobile performance score: 41

    41/100

    Your mobile performance score is 41. Under 50 is Google's “poor” band: many phone visitors leave before the page is usable.

  • Main-thread work: 6.3 s

    A phone's processor spends 6.3 s on main-thread work while loading, 3.8 s of it running JavaScript. Above 2 s, taps and scrolls feel sluggish.

  • 8 third-party services on the page

    8 third-party services load with your homepage (getpurpledot.com, Google Tag Manager and alia-prod.com and others), adding 1.3 MB and 2.0 s of main-thread time.

  • getpurpledot.com adds 627 ms

    627 ms

    getpurpledot.com costs a phone 627 ms of main-thread work and 162 KiB of downloads while your page loads. Loading it after the page is usable, or only on the pages that need it, takes that off the critical path.

  • Google Tag Manager adds 586 ms

    586 ms

    Google Tag Manager costs a phone 586 ms of main-thread work and 552 KiB of downloads while your page loads. Loading it after the page is usable, or only on the pages that need it, takes that off the critical path.

  • alia-prod.com adds 285 ms

    285 ms

    alia-prod.com costs a phone 285 ms of main-thread work and 257 KiB of downloads while your page loads. Loading it after the page is usable, or only on the pages that need it, takes that off the critical path.

  • 16 long tasks on the main thread

    16 long tasks block the main thread while loading, the longest for 301 ms. During a long task the page ignores taps.

  • Improve image delivery

    250 ms · 38 KiB

    2 images could be 38 KiB smaller with modern formats (WebP or AVIF) and sizes that fit a phone screen. Google estimates it would make the page about 250 ms faster on a phone.

  • Legacy JavaScript

    38 KiB

    Polyfills for old browsers add 38 KiB JavaScript that modern phones do not need.

  • Reduce unused CSS

    10 KiB

    About 10 KiB of CSS is downloaded but never applied on this page.

  • Chained critical requests

    Critical files load one after another instead of in parallel (3 chains). Preconnecting to key origins and preloading the hero image shortens the chain.

  • Forced reflow

    Scripts make the browser recalculate the layout repeatedly while the page loads, which wastes processor time on phones.

1 checks passed
  • Server response: 11 ms

    11 ms

    Your server sent the HTML in 11 ms, well inside Google's 600 ms guideline.

Core Web Vitals

6 to fix100
  • Largest Contentful Paint: 17.3 s

    17.3 s

    Your largest element takes 17.3 s to render on a phone. Google's threshold for “good” is 2.5 s. The largest element is the image.

  • Time to Interactive: 23.2 s

    23.2 s

    The page becomes fully interactive after 23.2 s. Good is under 3.8 s.

  • Speed Index: 8.7 s

    8.7 s

    Visually, the page fills in at 8.7 s (Speed Index). Good is under 3.4 s.

  • Total Blocking Time: 878 ms

    878 ms

    Scripts block taps and scrolling for 878 ms in total while the page loads. Good is under 200 ms.

  • First Contentful Paint: 3.0 s

    3.0 s

    The first text or image appears after 3.0 s on a phone. Good is under 1.8 s.

  • 5 images without width and height

    5 images have no width and height attributes, so the layout jumps as each one loads.

  • Tap response (INP) held steady for real visitors

    +6%

    Over the last 25 four-week periods to 2026-10-31, real Chrome visitors' tap response (inp) went from 128 ms to 136 ms at the 75th percentile (Chrome UX Report (opens in a new tab) history).

  • Largest content (LCP) held steady for real visitors

    0%

    Over the last 25 four-week periods to 2026-10-31, real Chrome visitors' largest content (lcp) went from 1.7 s to 1.7 s at the 75th percentile (Chrome UX Report (opens in a new tab) history).

7 checks passed
  • Passes Core Web Vitals for real visitors

    Real Chrome users on phones pass Google's Core Web Vitals on this page (28-day field data from the Chrome UX Report (opens in a new tab)).

  • Real-user LCP: 1.5 s

    1.5 s

    Real visitors wait 1.5 s for the largest content to appear (75th percentile). Good is under 2.5 s.

  • Real-user INP: 146 ms

    146 ms

    Real visitors wait 146 ms for the page to respond to a tap (75th percentile). Good is under 200 ms.

  • Real-user CLS: 0.06

    0.06

    For real visitors the layout shifts by 0.06 (75th percentile). Good is under 0.1.

  • Real-user FCP: 1.5 s

    1.5 s

    Real visitors see the first content after 1.5 s (75th percentile). Good is under 1.8 s.

  • Real-user TTFB: 256 ms

    256 ms

    Real visitors wait 256 ms for your server to start answering (75th percentile). Good is under 800 ms.

  • Cumulative Layout Shift: 0

    0

    The layout barely moves while loading (CLS 0, good is under 0.1).

Images and page weight

1 to fix85
  • Page weight: 3.7 MB in 344 requests

    3.7 MB

    Your homepage downloads 3.7 MB in 344 requests on a phone: scripts 2.0 MB (97), other files 1.0 MB (198) and images 524 KiB (25). Under 2 MB keeps phones on slow connections fast.

  • About 1.1 g of CO₂ per visit

    1.05 g

    By the Sustainable Web Design model, a visit to your homepage emits about 1.05 g of CO₂e: 126.1 kg a year at 10,000 visits a month. It scales with page weight, so every byte cut lowers it.

3 checks passed
  • Images use modern formats

    Every sizeable image is WebP, AVIF or SVG.

  • Images load when needed

    Images below the first screen wait until the visitor scrolls to them.

  • Images are sized for phones

    No image is downloaded at more than three times the size it is drawn on a phone.

Accessibility

9 to fixGoogle 9087
  • 2 text elements with low contrast

    2 text elements don't have enough contrast against the background to read easily, especially outdoors on a phone.

  • Hidden but focusable

    1 element hidden from screen readers can still receive keyboard focus.

  • Elements must only use permitted ARIA attributes (1 element)

    Elements must only use permitted ARIA attributes: 1 element on the page fails this check, rated serious by axe-core.

  • Malformed lists

    Some lists contain elements other than list items, which screen readers announce wrongly.

  • 2 images without alt text

    2 images have no alt text, which hurts accessibility and image search.

  • All page content should be contained by landmarks (7 elements)

    All page content should be contained by landmarks: 7 elements on the page fail this check, rated moderate by axe-core.

  • Contentinfo landmark should not be contained in another landmark (1 element)

    Contentinfo landmark should not be contained in another landmark: 1 element on the page fails this check, rated moderate by axe-core.

  • Page should contain a level-one heading (1 element)

    Page should contain a level-one heading: 1 element on the page fails this check, rated moderate by axe-core.

  • 1 form field without a label

    1 form field has no label, so screen readers announce an empty box and autofill guesses.

1 checks passed
  • 43 automated accessibility rules passed

    axe-core 4.13.0, the open-source engine behind most accessibility testing tools, ran 50 WCAG 2.2 A/AA and best-practice rules on the phone render: 43 passed and 7 failed. 2 mores need a person to judge. Automated rules catch about a third of accessibility problems; the rest need manual testing.

SEO

2 to fixGoogle 10085
  • No H1 headline

    There is no <h1>, so neither visitors nor Google get a clear main headline.

  • Meta description is long (184 characters)

    Your meta description is 184 characters; Google truncates after about 160, so the end of your pitch is cut.

  • No X (Twitter) card tag

    No twitter:card tag. X falls back to Open Graph, which is set, so this is minor.

  • 16 internal links, 6 external

    The homepage links to 16 pages on theunderdays.com and 6 external pages.

6 checks passed
  • Title: 65 characters

    Your title is a healthy 65 characters: “Underdays | Breathable and comfortable everyday TENCEL™ underwear”.

  • Canonical URL set

    The canonical URL is https://theunderdays.com/.

  • Structured data in place

    Structured data found: Organization and WebSite.

  • Open Graph tags complete

    Open Graph tags are complete, so shared links show a title, description and image.

  • robots.txt in place

    robots.txt is in place and points crawlers to your sitemap.

  • XML sitemap found

    Your XML sitemap is reachable at https://theunderdays.com/sitemap.xml.

AI search readiness

100
4 checks passed
  • AI answer engines may read the site

    Your robots.txt lets the crawlers behind ChatGPT search, Claude and Perplexity read the site and cite it in answers.

  • Organization data: 5 of 6 facts

    Your Organization JSON-LD gives name, url, sameAs (social profiles), description and contact details; logo would complete it.

  • Text is in the HTML

    Your server sends the page's text in the HTML (390 words), so crawlers that don't run JavaScript still read it.

  • llms.txt published

    The site publishes https://theunderdays.com/llms.txt (6 KiB, 8 links), a plain-text guide to the site for AI tools.

Other pages

2 to fix93
  • 3 pages share a meta description

    https://theunderdays.com/collections/bundle-and-save, https://theunderdays.com/pages/faqs and https://theunderdays.com/pages/size-charts use the same meta description. A description written for each page earns more clicks.

  • 6 pages without an H1

    https://theunderdays.com/collections/bundle-and-save, https://theunderdays.com/collections/bundle-builder, https://theunderdays.com/collections/shop-all, https://theunderdays.com/pages/faqs, https://theunderdays.com/pages/about and https://theunderdays.com/pages/sustainability have no <h1> headline, so visitors and search engines get no clear main topic.

  • 11 internal pages checked

    We fetched 11 pages linked from your homepage and read each the way a search engine does.

6 checks passed
  • Linked pages load

    All 11 pages we checked loaded without an error.

  • Canonical URLs point to themselves

    No page we checked hands its ranking to a different URL.

  • Every page has a meta description

    All 11 pages that loaded have a meta description.

  • Titles are unique

    Every page we checked has its own title.

  • No linked page is hidden from search

    None of the pages we checked carries a noindex tag.

  • Every page has a title

    All 11 pages that loaded have a <title>.

Best practices

2 to fixGoogle 9687
  • 3 small tap targets

    3 of 13 tappable elements near the top of the page are smaller than 24 px, hard to hit with a thumb.

  • 6 JavaScript errors while loading

    6 errors were logged to the browser console while the page loaded, for example “Failed to load resource: net::ERR_TUNNEL_CONNECTION_FAILED”.

1 checks passed
  • Mobile viewport set

    The page declares a mobile viewport.

Content and conversion

1 to fix92
  • Thin social proof

    Social proof on the homepage: 1 testimonial or review block. Pairing it with named testimonials or customer logos makes it far more convincing.

  • No risk reducer

    No guarantee or risk reducer (money-back, free trial, no credit card) is mentioned, which is often what tips a hesitant visitor.

  • About 252 words of copy

    The homepage carries about 252 words of visible text.

  • Urgency cues

    The page uses urgency cues (a countdown or limited-time wording).

5 checks passed
  • Clear next step on the first screen

    On a phone, the first screen shows a clear next step: “Shop All”.

  • 3 calls to action

    The homepage has 3 calls to action, for example “Apply”, “Shop All” and “Contact”.

  • 4 short forms

    4 short forms (1 field at most) are right on the homepage.

  • Analytics in place

    Analytics detected: Google Tag Manager and Microsoft Clarity.

  • Direct contact links

    Visitors can reach you directly: 0 phone links and 1 email link.

Privacy and tracking

1 to fix
  • 8 trackers load before any consent

    8

    Before a visitor clicks anything, the page loads Google Ads, Google Analytics, Google Tag Manager, Klaviyo and Meta Pixel and 3 mores (measured from a US location before any click). No consent tool was detected. Visitors from the EU, UK and several US states must be asked first.

  • 29 cookies set on arrival

    29

    Opening the homepage sets 29 cookies (measured from a US location before any click).

  • No consent tool detected

    No known cookie consent tool loads with the page. Some sites build their own banner, and some only show one to visitors from the EU.

  • 63 other companies contacted

    Loading the homepage contacts 63 hosts run by other companies (fonts, scripts, analytics, ads), each of which sees the visitor's IP address.

Security, domain, email and software versions

The security, domain and email checks, software and plugin versions, and any app with a known security problem are visible only to people at theunderdays.com, because details like these could help someone attack a site. Every review keeps them private, whatever they found.

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