Lining with leakpoof EVA, interior padded with premium non-woven fabric & 5mm thicken insulation pearl foam, protected with 300D waterproof oxford fabric, The Dual Compartment Leakproof Lunch Tote Bag has four-layer Insulation to keep food and drinks fresh/cool/warm for 4-8 hours. Its 2 isolated compartments allow you to separate hot and cold food/ beverages, great for ice packs and ice blocks to keep your food extra fresh.