18" x 22" Ecofoil Thermal Bubble Mailers - Pkg 50EcoFoil Thermal Bubble Mailers provide dependable temperature protection for products that need controlled conditions during shipping. Designed for items such as pharmaceuticals, chocolates, meats, cheeses, and other small or delicate goods, these insulated mailers help reduce heat gain and limit exposure to contaminants. The reflective poly bubble barrier blocks 96% of radiant heat, while the 3 16 thermal bubble layer adds shock absorption to guard