DOPPELGANGER Backpack Mesh Supporter “Senaka Murenzo” Marks Its 5th Anniversary

Motorcycle gear brand DOPPELGANGER’s backpack mesh supporter “Senaka Murenzo” (model: DBT617-BK) will mark its fifth anniversary on July 1, 2026. In recent years, Japan has continued to experience record-breaking summer heat. The stuffiness and sweat-soaked discomfort that occur on the back when carrying a backpack are common problems for many people, whether outdoors, riding, commuting, or going to school. This product brings the air ventilation structure used in mountaineering backpacks to ordinary commercial backpacks as an add-on accessory. Since its launch, it has remained a long-selling product that helps reduce back discomfort in summer. As heat countermeasures become a growing social issue this summer, the brand is reintroducing the product in conjunction with its fifth anniversary. Why it is drawing attention as a heat countermeasure: As Japan’s Ministry of the Environment issues heatstroke alerts earlier each year, lowering perceived temperature has become not merely a matter of comfort but a safety measure. Heat trapped between the back and a backpack directly increases perceived temperature. “Senaka Murenzo” creates a space of up to approximately 4 cm between the back and the backpack, allowing a large volume of air to flow through and effectively release heat caused by the backpack. It is useful across a wide range of summer situations, from hiking and touring to everyday commuting and school travel. Five years after launch, the reasons behind its long-selling popularity are simple. Since its release on July 1, 2021, “Senaka Murenzo” has been supported by a broad range of users, from outdoor enthusiasts and riders to business professionals who use backpacks daily. Its key advantages include a versatile belt-fastening design that can be attached to various backpacks, mesh material that combines breathability and anti-slip performance, a stylish design that does not compromise the backpack’s appearance after installation, and a lightweight build of only about 300 g. These features have become increasingly valuable as Japanese summers grow hotter year by year. Product features: The product turns the air ventilation structure of mountaineering backpacks into an accessory. Its double-sided mesh structure with an internal resin frame creates a space of up to approximately 4 cm between the back and the backpack, effectively dispersing heat and moisture. The belt-fastening design makes it easy to attach and remove, while the longer lower fixing belt also supports backpacks with waist belts. The coarse 5 mm mesh ensures breathability, and the PVC-coated surface prevents the backpack from sliding sideways, maintaining a stable fit even during active movement. Its design blends naturally with the backpack when attached, and excess belt length can be neatly secured with hook-and-loop fasteners. Product overview: Product name: Backpack Mesh Supporter “Senaka Murenzo”; model: DBT617-BK; color: black; size: W25 × L(D)5 × H41 cm; weight: 300 g including accessories; materials: polyvinyl chloride resin, polyester, polyurethane, and carbon fiber. Release date: July 1, 2021; fifth anniversary: July 1, 2026. Suggested retail price: open price, with a reference price of around 3,000 yen. Sales status: currently available. Product URL: https://www.doppelganger.jp/product/dbt617-bk/ About the brand: DOPPELGANGER develops and sells gear that combines practicality and design for everyone who enjoys motorcycle and outdoor activities. In addition to “Senaka Murenzo,” the brand offers many long-selling products designed for continued use in the field.