No need for battery fans! Cooling with just water. A solution for heat management in explosion-proof areas, factories, and construction/logistics sites.
The Aqua Water Vest is a non-electric water-cooled vest that utilizes the heat of vaporization of water to cool the body. Since it does not use batteries or fans, it can be used in explosion-proof areas where the use of electronic devices is restricted, as well as in environments where noise and dust are concerns. It is easy to use by simply filling it with water through the injection port located at the upper back, and it is also recommended for use in conjunction with fan-equipped clothing such as air-conditioned suits. Starting with the 2026 model (AT601), you can choose from regular models that cool both the front and back, front mesh models that cool only the back, and three-quarters models that are less effective at cooling the abdomen, depending on your work environment and application.
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basic information
2026 model: AT601 / Colors: Navy, Silver Gray / Sizes: F, EL, 5L. Regular models: AT101, AT301 Front mesh: AT201, AT401 Three-quarters: AT501 Cooling method: Evaporative cooling. Power source: Not required. Usage: Fill with water and wear. *Cooling effect varies depending on environmental conditions such as temperature, humidity, and wind.
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Applications/Examples of results
For heat countermeasures in construction, civil engineering, construction sites, manufacturing, factory work, logistics, warehouse operations, cleaning, maintenance, security, traffic control, delivery, transportation, driving, agriculture, greenhouse work, gas stations, outdoor sales, event staff, kitchens, and dining halls. It is also suitable for use in explosion-proof areas and other sites where electricity or batteries cannot be used, as well as for complementing the cooling of fan-equipped clothing.
Detailed information
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Aqua Water Vest (Regular Model) A basic model that cools the front and back. Available only in black. No battery required! The cooling sensation lasts for a long time with just water! The Aqua Water Vest adopts a unique evaporative cooling system. Simply pour water, and a gentle cooling sensation lasts for an extended period. Since it does not use electricity or fans, it can be safely used in explosion-proof areas and work sites where noise and dust are concerns. The vest cools the upper body, while the inner cap (sold separately) cools the head. By combining them, you can achieve dual cooling for "head + body," providing stronger support for heatstroke prevention. (*) *The cooling effect varies based on the principles of evaporative cooling, depending on the surrounding temperature, humidity, and wind strength.
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Aqua Water Vest 2026 Edition A new model that further enhances the cooling effect through evaporative heat and significantly improves comfort. Available in navy and silver gray. - No battery required! Gently cools using the power of water - Soft texture greatly enhances comfort - Completely separate type with water injection surfaces on three sides (front and back) - Stretch mesh on both sides and adjustable belt for a perfect fit - Uses special water-absorbing cotton in the core for improved water retention
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Aqua Water Vest (Front Mesh) This model prevents abdominal cooling and cools only the back. Available in black only. No battery required! The cooling effect lasts for a long time with just water! The Aqua Water Vest adopts a unique evaporative cooling system. Simply pour water, and a gentle cooling sensation lasts for a long time. Since it does not use electricity or fans, it can be safely used in explosion-proof areas and work sites where noise and dust are concerns. The vest cools the upper body, while the inner cap (sold separately) cools the head. By using them together, dual cooling for "head + body" is achieved, providing stronger support for heatstroke prevention. (*) *The cooling effect is based on the principle of evaporative cooling, so it varies according to the surrounding temperature, humidity, and wind strength.
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Aqua Water Vest (Three-Quarters) A sleeveless and lightweight design that does not cool the abdomen. Available in three colors: navy, silver gray, and fluorescent yellow. No battery required! The cooling sensation lasts for a long time with just water! The Aqua Water Vest adopts a unique evaporative cooling system. Simply pour water, and a gentle cooling sensation lasts for hours. Since it does not use electricity or fans, it can be safely used in explosion-proof areas and in work environments where noise and dust are concerns. The vest cools the upper body, while the inner cap (sold separately) cools the head. By using them together, dual cooling for "head + body" is achieved, providing stronger support for heat prevention. (*) *The cooling effect is based on the principle of evaporative cooling, so it varies according to the surrounding temperature, humidity, and wind strength.
Line up（4）
| Model number | overview |
|---|---|
| AT601 | Aqua Water Vest 2026 Edition: A new model that further enhances the cooling effect through evaporative heat and significantly improves comfort. Available in navy and silver gray. - No batteries required! Gently cools using the power of water - Soft texture greatly enhances comfort - Completely separate type with water injection surfaces on three sides - Stretch mesh on both sides and adjustable belt for a perfect fit - Uses special water-absorbing cotton in the core for improved moisture retention |
| AT101 | Aqua Water Vest (Regular Model) - A basic model that cools both the front and back. Available in black only. No battery required! The cooling sensation lasts for a long time with just water! The Aqua Water Vest features a unique evaporative cooling system. Simply pour in water, and the gentle cooling effect lasts for an extended period. Since it does not use electricity or fans, it can be safely used in explosion-prone areas and in work environments where noise and dust are concerns. |
| AT201 | Aqua Water Vest (Front Mesh) - A model that prevents abdominal cooling and cools only the back. Available in black only. No battery required! The cooling sensation lasts for a long time with just water! The Aqua Water Vest features a unique evaporative cooling system. Just pour water, and a gentle cooling sensation lasts for a long time. Since it does not use electricity or fans, it can be safely used in explosion-proof areas and in work environments where noise and dust are a concern. |
| AT501 | Aqua Water Vest (Three-Quarters) - A sleeveless and lightweight design that does not cool the abdomen. Available in three colors: navy, silver gray, and fluorescent yellow. No battery required! The cooling sensation lasts for a long time with just water! Simply pour water, and a gentle cooling effect lasts for an extended period. Since it does not use electricity or fans, it can be safely used in explosion-proof areas and work sites where noise and dust are a concern. |
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Company information
San-ei Electronics Co., Ltd. is an electronic components trading company established in 1968. We sell electronic components such as capacitors, which stabilize voltage and can store and discharge electricity, and inductors, which can store energy in a magnetic field formed by current. We also engage in product development and contract manufacturing in collaboration with over 50 partner manufacturers both domestically and internationally. We are sales agents for companies such as Murata Manufacturing Co., Ltd. and Rohm Co., Ltd. In recent years, we have expanded our offerings beyond electronic components to include individual products, tackling solutions for changing social environments across various industries, including heat countermeasure products, cleaning robots, and transport robots. Please feel free to contact us with any inquiries.
