Sun Protection Claims for Retailers: What UPF Labels Mean

Sun protection is the fastest-growing reason customers give for buying a hat — and in sun-conscious markets like New Zealand, Australia and the UK, it is often the reason. But the moment a retailer starts printing "UPF 50+" on a hangtag or a product page, they take on a claim, not just a feature. Get it right and it is one of the most persuasive labels in the category. Get it wrong — copied from a supplier's website, never verified — and it becomes a refund, a review, or in some markets a compliance problem.

This guide explains, in plain language, what UPF means, how a hat actually earns the number, what a retailer can responsibly say in-store and online, and the exact questions to ask a supplier before repeating their claims. It is written from the factory side: we make the Felamouhe straw hat range (our sister brand Fivemax covers printed straw bags), and we see both the good labelling and the wishful thinking that passes through this category.

UPF — Ultraviolet Protection Factor — measures how much ultraviolet radiation passes through a fabric. The scale is not about sunscreen: SPF 30 on a lotion means roughly 1/30 of UV reaches the skin under ideal application. UPF on fabric works differently. A fabric rated UPF 50 allows about 1/50 of UV through, blocking roughly 98%.

The familiar tiers:

Two things worth knowing immediately. First, a label without a number — just "sun protective" or "UV protection" — is a marketing phrase, not a tested rating. Second, the rating belongs to the fabric, tested under controlled conditions. It does not automatically describe the finished hat, which has seams, a crown, ventilation, and a brim whose coverage depends entirely on how it is worn.

Testing is done in a laboratory, not in the sun. A spectrophotometer measures how much UVA and UVB passes through fabric samples. For woven straw, the results are dominated by three variables:

This is also why honest suppliers test the crown fabric and describe the brim separately: a brim's job is shade, and shade depends on width and angle, not on a fabric rating. A 10 cm brim casting shade over the face, ears and neck is doing more real protection work than any number printed on the crown.

For a retailer, the safest structure is a three-part claim:

Claims to avoid:

A note on the UK specifically: there is no mandatory scheme like AS/NZS 4399, and British shoppers know it. This is why the market searches in plainer language — best hat for sun protection has grown over 120% in UK search interest — and why a plain, confident description of brim width and weave density often outsells an unexplained number.

If your customers are buying for protection, shape matters more than the label:

A practical in-store line that never overclaims: "The brim gives you the shade; the tight weave means the shade is real." Customers understand that instantly, and it is true of every hat worth stocking.

Before you accept or repeat any sun protection claim from a supplier, ask:

A supplier who answers all six in a day is a supplier you can build a sun-protection line with. One who sends back a screenshot of another website is not.

Before any UPF or sun protection wording goes on your hangtag, listing or shelf card:

What does UPF 50+ actually mean on a hat?That the tested fabric allowed less than 1/50 of ultraviolet radiation through — roughly 98% blocked. The rating applies to the tested material, usually the crown fabric; overall protection also depends on brim width and how the hat is worn.

Can I print UPF 50+ on an open-weave or crochet straw hat?No. Open weaves pass a significant share of UV through the gaps between strands, and no test report would support the number. Describe those hats by style and airflow instead — they sell as breathable summer hats, not as protective ones.

Is AS/NZS 4399 relevant outside Australia and New Zealand?It is the recognised standard in those two markets, where shoppers look for it. In the UK there is no equivalent mandatory scheme, so descriptive claims — brim width, tight weave, tested fabric — are more effective than a foreign standard number.

Do I need my own test report if the supplier has one?You need to be able to produce a report if a customer or regulator asks. Keep the supplier's report on file, check that it names the exact fabric and standard, and never restate a number you have not seen evidence for.

What is the safest sun protection wording for a product page?Describe the tested fact and the geometry: "Crown fabric tested to UPF 50+ (AS/NZS 4399:2017). 10 cm brim shades face, ears and neck." Nothing else is needed, and nothing else is risk-free.

If you are building a sun protection line for your store, the labelling is only as good as the hat under it. Felamouhe straw hats are made by Xuzhou Muhe Handicraft Co.,Ltd, and we work with retailers on exactly the questions above: