60 hour UniHeat heat packs (shipping warmers) activate slowly, up to 2 hours. They get warmer than the 40 hour heat packs, and reach their peak temperature in approximately 24 hours. 60 hour UniHeat shipping warmers are the best choice for 2nd day shipments.
Under “Shipping Tips” found at the top of the home page, please see our complete guide on how to properly use and choose which UniHeat heat pack product is right for your shipping needs.
Price per Unit (piece): $17.45