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Durable Water Repellent (DWR) is a textile treatment applied to fabric used for clothing, including headwear. The treatment prevents water from saturating the fabric and instead causes water to bead up and roll off the surface, keeping your hat (and head) dry. There are several different types of...
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UPF stands for Ultraviolet Protection Factor, which is the international standard for rating UV resistance in textiles.
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What is the highest UPF rating?
That depends on the testing method used to determine the UV levels. In the United States, UPF tests adhere to the American standard AATCC 183, using the sun spectrum of Albuquerque, New Mexico, the same as the European Standard. At Sunday Afternoons, we work with an independent, certified testing... -
What UPF certifications do your hats have? How do you test them?
The majority of our line is rated UPF 50+, the highest possible rating, blocking over 98% of UVA and UVB rays. All of our materials are tested at independent labs in accordance with AATCC 183-2014, the international testing standard for UPF ratings in textiles. We conduct UPF testing on our produ... -
What is Convertible Ventilation™?
Our Convertible Ventilation® flaps are pieces of fabric featured on a variety of our hats that can be flipped up or down. Flip the fabric up to expose breathable, ventilated mesh to keep you cool. Flip the fabric down to provide extra coverage and protection from the elements. -
Coolcore® is a patented, chemical-free cooling technology built into the fabric fibers of our hats. It maximizes their wicking ability, quickly evaporating sweat and keeping you cool and comfortable in any condition. Coolcore® rapidly cools and wicks moisture through regulated evaporation. Best o...
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Is Coolcore® a chemically treated fabric?
No. While other cooling fabrics use chemicals to enhance wicking, transportation, and evaporation, Coolcore® fabrics are chemical-free. Topical chemicals can not only be harmful to your skin, but after only a few washes, the cooling properties of the product are no longer effective. Coolcore® coo... -
SmartStrap™ is a chinstrap that keeps kids' hats in place, but it will break away safely if given a good tug.
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Clamshell Brim® is a space-saving design that allows the hat to fold up and fit into a pocket.
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What is Sunglass Lock™ and how does it work?
Don't shake off and lose a great pair of shades! Sunglass Lock™ allows you to lock your sunglasses in place on many of our hats using patented, integrated sleeves. For more information on Sunglass Lock™, please watch this short -
Fold-away Flaps are earflaps that can be flipped up or pulled down to protect the ears from harsh weather.
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StretchBack™ Sizing is a patented technology that fuses traditional snapback sizing and elastic material to maximize comfort. For more information on StretchBack™ Sizing, please watch this short
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At Sunday Afternoons, our hat colors cover a spectrum of hues. Depending on the amount of exposure to ultraviolet light, some of the more vibrant, saturated colors can lessen in vibrancy over time due to photodegradation. Rest assured, this will not affect the UPF rating or quality of the hat. Su...
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What testing have you done for masks?
We do extensive testing on our finished masks, headwear, and other accessories to ensure compliance with regulatory standards and our internal Restricted Substance List (RSL). The 100% polyester Coolcore® fabric in our UVShield Cool Face Mask was tested by the Hohenstein Institute and SGS. SGS ... -
Where can I find a summary of your patents?
Click on the link below to see a list of our products and patents. The list may not be inclusive; additional patents may be pending in the United States and elsewhere. One or more patents may protect other Sunday Afternoons products not listed here. This page is provided in compliance with the vi...