POLY-TOP PREVENTS THE ACCUMULATION OF WATER, SNOW, DIRT AND DEBRIS ON OVERPACK LIDS WHILE PROTECTING OVERPACKS AGAINST WEATHERING AND LONG-TERM UV DEGRADATION. THE HIGH-VISIBILITY COLOR AND CLEAR MSDS POCKET ARE ADDED FEATURES TO THE POLY-TOP IS MADE TO FIT 65 & 95-GALLON POLY-OVERPACKS® AND SPILL KITS.