The Cold-Averse Diver's New Secret Weapon – 3 Key Features of the POWAT Waterproof Heated Illumination Vest

They say fame is a burden for people and fat is a burden for pigs — but what do divers dread most? If you've ever suffered a pounding headache or the misery of hypothermia from slightly chilly water, you'll know exactly what we mean. A dive trip that should be pure joy can end with you lying on the shore long before you're ready to call it a day. Unfortunately for Taiwan, sitting squarely in the subtropics means that once Mid-Autumn Festival passes, diving in the north practically grinds to a halt — water temperatures that hovered at a pleasant 28°C in summer can plunge all the way down to 19°C. Further south, spots like Kenting and Xiaoliuqiu benefit from lower latitudes and the warming influence of the Kuroshio Current, yet certain dive sites there can still dip below 24°C.

Everyone's cold tolerance is different, of course, but as a general rule a 3mm wetsuit is standard below 28°C, while temperatures under 22°C call for a 5mm wetsuit plus a hood — or even a drysuit for extended immersion in frigid water. Thicker suits are not only awkward to put on and take off; their added bulk increases buoyancy, meaning you need to strap on more weights. The whole dive becomes that much harder work!

In recent years the international diving market has seen a wave of heated undergarments aimed squarely at cold-sensitive divers, yet most have stumbled on the same issues: clunky, inconvenient designs and oversized battery packs that give divers pause before pulling out their wallets. The POWAT Waterproof Heated Illumination Vest is a Made-in-Taiwan (MIT) product — designed, assembled, and tested right here on the island. It centres on three standout design innovations, all aimed at helping every diving enthusiast extend their dive season and make every single dive more comfortable.

POWAT Waterproof Heated Illumination Vest – Pre-Order Now

1. POWAT Waterproof Heated Illumination Vest — "Patented Battery Technology"

The battery system is one of the POWAT vest's most compelling features. The cells are licensed from Japan's Panasonic, guaranteeing both longevity and safety. Charging is handled entirely by wireless technology — simply place the battery on the charging dock and it begins charging immediately. This means the battery assembly uses not a single O-ring, dramatically reducing the risk of hardware degradation from future maintenance and regular use.

Divers can control heating through five levels using the button on the battery itself. On a full charge, running at Level 3 provides roughly 3 hours of heating — enough for approximately 2–3 scuba tank fills. Future iterations of the design may incorporate a temperature sensor to prevent overheating. Keeping the battery outside the wetsuit offers two key advantages: conventional heated vests hide the battery inside the suit, where its rigid form can press uncomfortably against the body, and if the unit malfunctions and overheats during a dive, there is no easy way to deal with it underwater. With the POWAT's external battery design, you simply unhook the D-ring and disconnect the wireless charging module to eliminate any malfunction instantly — a significant boost to overall safety.

2. POWAT Waterproof Heated Illumination Vest — "Wireless Power Transfer Technology"

The vest itself also relies on wireless power transfer. The battery assembly and heating assembly are held together by powerful magnets that maintain a secure wireless power connection; they will not come apart even with up to 5mm of wetsuit material between them. This design lets you position the heating pad anywhere on your body and deliver warmth via the wireless module. The battery sits outside the wetsuit and can be clipped to a D-ring, functioning as ballast (approximately 920 g). In any emergency — or when swapping batteries — you simply pull the wireless modules apart. This is the single biggest differentiator between POWAT and every comparable product on the market.

3. POWAT Waterproof Heated Illumination Vest — "Ultra-Thin LED Lighting Module"

Without a doubt, the feature that has drawn the most attention is the chest-mounted light. It uses 24 high-brightness LED ultra-thin flat diffusion lamps, which can illuminate your path when entering or exiting the water during night diving. Because the LEDs generate no heat, they can be left on continuously. Along the Northeast Coast, where visibility can plummet, they also serve as an invaluable tool for instructors in training scenarios — students can instantly spot the direction of their instructor underwater. In the future, instructors and dive shops will be able to choose from different coloured filters and pattern cards to create a unique team identification system all their own.

The launch of the POWAT Waterproof Heated Illumination Vest is intended to extend everyone's dive season. Instructors and dive shops along the Northeast Coast, for example, typically cannot begin teaching or leading guided dives until May; with the POWAT vest, they can add several extra months of operating time right away. Offering this kind of equipment to students means every dive can be completed in comfort, building trust and a sense of professionalism among clients — great service, built up one small detail at a time.

Another target group the product hopes to reach is underwater photographers — those who hover motionless over the reef for extended periods, hunting for macro subjects. Prolonged exposure to cold water takes a real physical toll and can directly affect the quality and efficiency of their shots. The POWAT Waterproof Heated Illumination Vest aims to give every diver a warmer, more comfortable experience beneath the surface.

Beyond water sports enthusiasts, virtually anyone who needs to spend extended time outdoors in a waterproof garment can benefit from the POWAT Waterproof Heated Illumination Vest — anglers, high-altitude rigging crews, outdoor construction workers, and more. Even on a cold winter ride, you can slip the POWAT vest under your regular clothing for all-day warmth. The range of use cases is as broad as it is practical.

POWAT Waterproof Heated Illumination Vest – Pre-Order Now

Note: The POWAT Waterproof Heated Illumination Vest is currently available for pre-order; all specifications are subject to change based on the final shipping product. To learn more about product specifications and hands-on impressions, please contact the HaveFunAllYear fan page.

Further Reading:

• 【Must-Buy in Japan】The World's Largest Scuba Diving Equipment Store — mic21's Top 5 Best-Selling Products Revealed