New Release! 'All Fit Sepacool' Cooling Vest Fits Any Body Type with Unique Structure!

Hatsumei Labox Corporation (headquarters: Shinjuku-ku, Tokyo) has licensed the implementation rights of 'All Fit Sepacool,' a cooling vest with a unique structure that fits any body type, to Taisei Senko Corporation (headquarters: Soka-shi, Saitama Prefecture). Pre-sales will begin on June 15, 2026, at 10:00 AM through the crowdfunding platform 'Makuake (Makuake).'

Strengthening Heatstroke Prevention Measures Amid Rising Demand for On-Site Heat Countermeasures

In recent years, Japan has experienced record-breaking heatwaves, highlighting the importance of heatstroke prevention in outdoor and high-temperature work environments such as construction, logistics, and manufacturing.

On June 1, Reiwa 7, the Labor Safety and Health Regulations were amended, making heatstroke prevention measures mandatory for employers. This has significantly shifted corporate heatstroke prevention strategies from 'recommended' to 'required measures.'

However, on-site challenges include:

- Complex size management of cooling vests
- Missed opportunities due to size shortages
- Need to interrupt work for ice pack replacement
- Reduced usage rates due to restricted movement

To address these issues, Hatsumei Labox Corporation, in collaboration with Taisei Senko Corporation, has developed 'All Fit Sepacool,' a more comfortable cooling vest.

This product features a unique back structure that accommodates a wide range of body types with a one-size-fits-all design. Additionally, it allows ice packs to be replaced from the outside, balancing work efficiency with cooling effects.

[Feature 1] Unique Structure Fits Any Body Type, Male or Female

The product adopts a unique structure where the back is split into left and right sections and connected with three stretchable rubbers (patent pending).

This design flexibly fits various body types, eliminating the need for detailed size variations found in conventional cooling vests, allowing many people to wear them comfortably.

When purchasing in bulk for companies, there is no need to worry about sizes, leading to cost reduction.

[Feature 2] Four Ice Packs for Excellent Cooling Effect! Replace Ice Packs in 'Seconds' Without Removing Outerwear

The product uses two types of dedicated ice packs for different purposes.

A high-cooling type is placed at the 'clavicle' area, prioritizing cooling power, while a long-lasting type is placed at the 'armpit' area, prioritizing duration. This achieves both instantaneous coolness and sustained comfort. The design includes ice pack pockets on the outside of the vest for easy replacement.

[Feature 3] Boost Cooling Power by Using as an Inner Layer for Air-Conditioned Clothing

With conventional cooling vests, outerwear or air-conditioned clothing must be removed to replace ice packs. 'All Fit Sepacool' places ice pack pockets on the outside, allowing ice pack replacement even while wearing outerwear. This maintains cooling effects without interrupting work.

[Feature 4] Flat Rubber on the Back for Easy Movement!

Having a back panel makes it difficult for broad-shouldered individuals to move and causes bulkiness for smaller individuals, preventing the ice packs from fitting well. This product splits the back panel and securely connects it with flat rubber, achieving a one-size-fits-all vest that does not feel restrictive.

The ice pack pockets are slightly positioned towards the back rather than the underarms, allowing for unrestricted movement and making the wearer forget they are wearing it.

[Feature 5] Adoption of Thin, High-Performance Ice Packs!

The product uses thin, high-performance Japanese-made ice packs. Evidence data shows they last 5 hours at a temperature of 30 degrees Celsius. Their thinness does not interfere with work.

For new product development, Hatsumei Labox's 'Biz Shien' service can be of assistance.

Hatsumei Labox supports corporate original product development with the concept of 'Create, Protect, Sell.' The 'Create' part, 'Biz Shien,' provides one-stop support from product idea planning to prototyping, productization, intellectual property rights acquisition support, and crowdfunding implementation.

This 'All Fit Sepacool' was developed to address issues faced by Taisei Senko Corporation, a uniform sales company, including 'cooling vests have many size variations, making inventory management difficult,' and 'best-selling sizes are prone to shortages while other sizes remain unsold.'

To solve such problems, Hatsumei Labox devised a unique back structure. To reduce inventory risks, they achieved a one-size-fits-all design that accommodates a wide range of body types, balancing improved wearer comfort with reduced inventory risks for sellers. The new product was completed in approximately two months of development.

Consultations for product development with our company are welcome, even if you do not have a specific product idea. Please feel free to contact us.

Biz Shien LP Page

Makuake Project Overview

Project Name:
'Cool Vest with Easy Ice Pack Replacement from Outer Pocket in Seconds! Pursuing Easy Movement'

Project Implementation Period:
June 15, 2026, to July 23, 2026

Sales Platform: Makuake (Makuake)

Makuake Implementer:
Taisei Senko Corporation

Project Page:
https://www.makuake.com/project/allfit-sepacool/

Company Overview
The manufacturer of this product is Hatsumei Labox Corporation.

[Hatsumei Labox Corporation]
Address: 801 Shinjuku Central Heights, 1-1-45 Ohkubo, Shinjuku-ku, Tokyo
Representative: Naomi Matsumoto
Business Description: Product development, manufacturing, sales, crowdfunding support
URL: https://www.hatsumeilabox.com/

[Taisei Senko Corporation]
Address: 27-4 Nishimachi, Soka-shi, Saitama Prefecture
Representative: Yasushi Yoshida
Business Description: Uniform sales, embroidery processing, print processing, planning and sales of original products
URL: https://taiseisenkou.com/

[Inquiries regarding this matter]
Hatsumei Labox Corporation
TEL: 03-6233-9750
E-mail: info@hatsumeilabox.com