YAMA HCP (HOT COLD PACK) A set of one S and one M size. New, unopened. Purchased in February 2023. I have stored it carefully, but I am selling it to organize my collection. From the website: After teasing on Instagram for a while, I've finally released this updated product. I've used various cooler bags and cozies for mountain use. Based on that experience, I tested various types, but box-shaped ones are bulky when stored, and vertical ones with zippers lack compactness, and are bulky when placed horizontally... After much deliberation, I went back to basics and found that a roll-top design surprisingly worked well! However, if you put a cooling sheet even in the roll-top part, it deteriorates; So, I gave the Xpac part below the cooling power, and intentionally didn't give the upper Dyneema grid part any cooling power. After testing this, the results were quite good, so I decided to commercialize it. Hyperlite Mountain Gear HYPERLITE MOUNTAIN GEAR Moonlight Gear MoonlightGear Barricades Ultralight jincup Jindaiji Mountain Works jindaiji mountain works ULA Equipment Six Moon Designs Six moon designs OMM coop alex If You Have Pa'lante Pa'lante Packs Gachidake Hikers Depot hikers depot Atelier Blue Bottle Atelierbluebottle Locus Gear Locus gear Zpacks Sola Titanium Gear sola titaniumgear Mikikurota mikikurota SANPO STOVE Sanpo Stove sanpo's fun lite gear Senchi Designs Senchi Designs