{"product_id":"coolhands","title":"CoolHands","description":"\u003cp\u003eCoolHands uses a phase-change material (PCM) with a 10 °C melting point to extract heat through direct skin contact. It can be applied to the hands or other body sites (such as the neck, forehead, or pulse points) to support local cooling and thermoregulation. It can also be placed on the chest and back for further regulation.\u003c\/p\u003e\u003cp\u003eHeat extraction occurs by conduction and depends on a temperature gradient between the skin and the cooler material. While the PCM is solid or actively melting at its 10 °C set-point, it absorbs heat. Once fully melted and warmed toward skin temperature (typically the low-to-mid 30s °C), the gradient collapses, latent-heat capacity is exhausted, and the pack begins to act as an insulator rather than a heat sink.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy the temperature range matters\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eToo cold:\u003c\/strong\u003e Prolonged contact with a surface well below 0 °C can trigger strong local cutaneous vasoconstriction. This reduces blood flow to the skin, which may limit further heat delivery from deeper tissues and can become counterproductive to overall heat loss when core temperature is elevated (Alba, Castellani \u0026amp; Charkoudian, Exp Physiol 2019).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePast the melting point:\u003c\/strong\u003e After the 10 °C phase change is complete, useful extraction ends. Leaving the spent pack in place adds thermal resistance instead of removing heat.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eA 10 °C melting point provides a stronger, shorter extraction dose than milder 15 °C PCM grades used in longer-wear garments, while remaining above temperatures that commonly produce aggressive vasoconstriction or cold discomfort in most users. Placement on different body sites allows targeted use where local cooling is desired.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003ePractical guidance\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eApply CoolHands while the pack is still active. Remove or re-chill it once it has fully melted and feels close to skin temperature - the same principle as not leaving a frozen pack in continuous contact beyond its useful window.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWear time and storage\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eLasts up to 2 hours, or throughout a shift if put back into a cold container. Store it in the \u003ca href=\"\/products\/coolhed-portable-cooling-system\"\u003eCoolHed Portable Cooling Container\u003c\/a\u003e, which fits 10, or in an esky.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eVolume pricing\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e$85 AUD each, or packs of 10 to 1,000 on a volume discount with freight included in Australia. For more than 1,000, \u003ca href=\"#bulk-enquiry-form\"\u003esend a bulk enquiry\u003c\/a\u003e.\u003c\/p\u003e","brand":"CoolHed","offers":[{"title":"Default Title","offer_id":67326469963851,"sku":"CH-HND-1","price":85.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0569\/1637\/7675\/files\/coolhands-on-plinth.jpg?v=1792925184","url":"https:\/\/coolhed.com\/products\/coolhands","provider":"CoolHed.","version":"1.0","type":"link"}