1. vacuum space 2. heat resistance layer 3. resin material 4. moderate and favorable price 5. well-recognised Model Number Weight Bulk anti condensation force Inner Space Outer Space BWX-2600 4.4kg 26L 1.25# 21.5x41.5x29 31.5x52x36 Our insulated fishing box has the advantage of convenient taking ,easy cleansing ,and most importantly , it also has the function of thermal-keeping.