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What does the UPF50+ rating measure?

When choosing UV-protective clothing, most people look for "UPF 50+." However, there aren't many places that explain exactly what range this number measures. I will discuss the ranges that UPF cove...

The Pitfalls of Autumn Golf: Even if it gets cooler, the sun is just as strong.

The weather has cooled down, so the sun must be weaker, right? Think again. In terms of classification, ultraviolet radiation in September is still just as "strong" as it is in August. A single rou...

What percentage of sunlight does sunscreen block?

"Sunscreen is designed to block approximately 5% of the sunlight that reaches the Earth's surface. SPF, PA, and UPF are all metrics for ultraviolet radiation, and there are no criteria for evaluati...

Revisiting Mandatory Heatstroke Prevention in the Workplace in Its Second Summer: Beyond Structural Improvements to "Equipment"

Workplace heatstroke casualties continue to rise. In this article, we will briefly outline the key points of the legal requirements, and then go "beyond" mere organizational preparation to explain ...

Why Hats Are Essential for Heatstroke Prevention: How to Choose One and the New Standard of "Near-Infrared Cut"

In this article, we explain why hats are effective for heatstroke prevention, along with a new selection criterion to look for beyond shade and breathability: "near-infrared ray protection."

Heatstroke prevention for field and farm work: Transforming summer labor with fan-equipped clothing and base layers

In recent years, heatstroke prevention in the workplace has been positioned as a critical responsibility for employers, and the era of "grit and determination" is over. This article outlines practi...

Heatstroke Prevention for Golf: A Summary of Summer Attire, Essentials, and On-Course Precautions

This article summarizes heatstroke prevention measures for summer golf in three stages: "the day before," "attire and belongings," and "during the round."

How to Choose Heatstroke Prevention Innerwear: A Thorough Guide to the Differences Between Cooling and Heat-Shielding Types

Innerwear designed to prevent heatstroke comes in two types with different mechanisms, and if you choose without understanding these differences, you won't get the results you expect. In this artic...

What is near-infrared light? An easy-to-understand guide to the differences from ultraviolet rays and their effects on heatstroke and the skin

Ultraviolet rays make up only a small fraction of sunlight. The primary factor that raises body temperature and triggers heatstroke is "near-infrared radiation."