Insulating packaging for Cold Chain Shipping. Radiant Heat Reflective Bag. Thermal protection liner for insulating shipping coolers. Thermalast Bag from Integritemp/Plastilite. #TB22X20-SAT 250/cs. For coolers up to 0.5 cu ft payload. Routinely extend safe transit times of perishables by 25% - 40%. Use year-round or as a protocol for warmer shipping conditions and/or destinations. Variety of stock sizes to cover a wide range of payload dimensions. Thermalast bags can often pay for themselves several times over in shipping cost savings. Increases effectiveness without increasing dim weight of packages and can be used to shrink package size by reducing coolant requirements. Effective with dry ice, gel ice packs and ice bricks. As an example, the 22x20 bag will work in a cooler with inside dims in the range of 8x7x11 up to 11x8x9.