Thickened PE Material and durable construction Thickened PE material with seamless assembly provides sturdiness and a leakproof design. Built for reliable performance, these packs are easy to clean and functional. LongLasting thermal performance for reliable cooling Coarse dry ice pellets enable energy storage for extended cooling in largecapacity coolers. Delivers uninterrupted cooling during transport or storage, supporting fresh food, beverages, and perishable items. Easy to use and quick to deploy The ice packs do not freeze in two to four hours, expand as they chill, and help maintain cooler temperatures with minimal effort. Simple to apply in lunch bags or coolers, helping you keep contents cold with little handling. Impressive package and flexible compatibility Selfwatering requirements and supplied as an 8piece set. Reusable ice packs designed to optimize air cooler capabilities while maintaining ultralong cooling memory for consistent chilling performance. Use scenarios Road trips, camping, or outdoor events: place these packs in largecapacity coolers to extend the time between refills and keep snacks and drinks cold. Daily lunch bags or portable coolers: use for everyday meals to maintain safe temperatures with minimal effort. Portable cooling setups: incorporate into air coolers or other portable cooling arrangements to enhance overall cooling memory and performance.