Snow Peak's First-Ever Cooling Apparel Line Uses Peltier Technology and Water Circulation to Solve Japan's Extreme Heat Problem

Summary

• Snow Peak is launching its first cooling apparel collection, the Cooling System Wear, on May 22 with two new vests joining two already-released items across a four-piece lineup
• The Peltier Cooling Device Vest features an industry-first simultaneous operation of six Peltier units and two fan units; the Water Cooling Device Vest circulates cold water through internal tubes via a pump system
• Both vests are constructed in Taslan nylon, available in Black, and sold through Snow Peak directly managed stores, the official online store, and select retailers nationwide

Snow Peak is entering cooling apparel for the first time with the Cooling System Wear series, launching May 22 in Japan. The collection leads with two new vests built around active cooling technology: the Peltier Cooling Device Vest and the Water Cooling Device Vest at, both joining an already-released evaporative cooling poncho and stainless steel cooling pack.

The Peltier Cooling Device Vest is the headline piece and the one that warrants the most attention from a technical standpoint. It combines contact cooling via Peltier units with airflow cooling via fan units, with six Peltier elements and two fan units operating simultaneously — a configuration Snow Peak describes as an industry first. The placement is deliberate: two small Peltier units at the neck, two large units across the back, and two large units at the sides, targeting the body’s key heat exchange points. The vest runs on a battery pack included in the set and is constructed in Taslan nylon, a synthetic fabric with a natural-feeling texture that keeps the build wearable across both outdoor and everyday contexts despite the hardware it carries.

The Water Cooling Device Vest takes a different approach to the same problem. A rear-mounted tank feeds cold water through internal tubes via a pump, using water’s high thermal conductivity to draw heat away from the body consistently and quietly. The tank accepts water, ice, and the included stainless cooling packs, giving the wearer control over the intensity of cooling. The water-cooling sheet inside is removable, which allows the vest to function as a standard multi-pocket field vest when active cooling is not needed — a practical conversion that extends the piece’s usability well beyond peak heat conditions. Like the Peltier vest, it is built in Taslan nylon in a single Black colorway.

The wider context for this launch is one Snow Peak makes explicit in its press release: Japan’s summers are arriving earlier and hitting harder than at any point on record, with heatwave days exceeding 35°C now frequent across the country from early summer onward. For a brand built on the philosophy that outdoor life should be lived fully regardless of conditions, cooling apparel is a logical next category. What is less expected is the level of engineering Snow Peak has brought to the entry. The Peltier vest in particular is not a compromise product; it’s priced as serious equipment, built with the same conviction Snow Peak applies to its titanium cookware and its campsite furniture.

Snow Peak’s Cooling System Wear launches May 22 at Snow Peak directly managed stores, the Snow Peak official online store, and select retailers nationwide in Japan.