At first glance, a cooling bucket hat may look relatively simple. But look underneath the brim and you'll find that the details that matter most are hidden inside. The distinctive blue section of the BERTSCHAT Cooling Bucket Hat isn't there for decoration. It's the functional heart of the design: a specially developed evaporation layer designed to hold and distribute moisture and support natural cooling.
So, what exactly happens inside the hat once you add water?
Designed for cooling
When developing a cooling hat, simply choosing a lightweight fabric isn't enough. The design needs to combine sun protection, moisture management and comfort without becoming heavy or uncomfortable when wet. That's why the BERTSCHAT Cooling Bucket Hat combines a traditional wide-brim bucket hat design with a dedicated cooling section.
The outer construction provides coverage from direct sunlight, while the blue evaporation fabric in the upper section performs a completely different job: managing water and creating the conditions for evaporation.
It's a small detail you might barely notice while wearing the hat, but it's what transforms it from a regular bucket hat into a cooling product.
Inside the blue evaporation layer
Take a closer look inside and you'll immediately recognise the blue cooling material.
Its purpose is threefold:
- Absorb. The material takes up the water used to activate the hat.
- Spread. Rather than keeping the moisture concentrated in one area, the fabric helps distribute it across the cooling section.
- Evaporate. Once exposed to warm air, that moisture can gradually evaporate. The evaporation process requires energy, drawing heat from its immediate surroundings and creating the cooling sensation.
Instead of actively producing cold with batteries or electronics, the hat therefore makes use of a natural physical process.

Why only part of the hat uses the cooling material
There's another deliberate design choice that's easy to overlook.
The entire hat doesn't need to be made from evaporation material.
Placing the functional material in the upper section allows the cooling effect to be concentrated around the head while the rest of the hat can retain the characteristics you expect from a bucket hat: structure, a wide brim, low weight and comfortable wear.
It also means you don't need to walk around wearing a completely soaked hat.
The water goes where the cooling technology needs it.
Activate it in seconds
The technology may be hidden inside the hat, but activating it is deliberately simple.
- Wet it: Thoroughly wet the top of the hat with cold water so the evaporation material can absorb the moisture.
- Wring it: Gently remove excess water. You want the material to remain damp, rather than dripping wet.
- Wear it: Put the hat on. The evaporation process starts naturally as moisture is released into the surrounding air.
There's no charging, freezing or preparation required. When the material eventually dries and the effect decreases, simply repeat the process.
Wet. Wring. Wear.

Why movement actually helps
This is where evaporation technology becomes particularly interesting for an outdoor product. Evaporation depends partly on the surrounding conditions. Air moving across a wet surface helps moisture escape from the material.
That means natural airflow while walking, hiking, working or exercising can support the evaporation process. The technology therefore doesn't restrict you to one environment. It is designed around movement.
One hat, two functions
Cooling isn't the only consideration when you're outside in warm weather.
The bucket-hat construction provides a wide brim around the head, helping provide shade from direct sunlight. At the same time, the evaporation section adds a cooling function without batteries or separate cooling elements.
The result is deliberately uncomplicated:
Water for cooling.
A wide brim for shade.
A lightweight design for movement.
Cooling that moves with you
Good product design isn't always about adding more technology. Sometimes it's about using the right material in exactly the right place.
The blue layer inside the BERTSCHAT Cooling Bucket Hat is a perfect example. Add water and the material takes care of the rest, using evaporation to provide cooling wherever your day takes you.
From a summer hike to a day at the beach, outdoor work or your next adventure, activation only requires access to water.
Engineered to keep you cool. Made to move with you.
