7" x 11.5" Ecofoil Thermal Bubble Mailers - Pkg 100EcoFoil Thermal Bubble Mailers provide reliable temperature protection for small, sensitive shipments. Designed for pharmaceuticals, chocolates, meats, cheeses, and other delicate goods, these insulated mailers reduce heat exposure and help guard against contamination, spoilage, and tampering. The reflective poly bubble barrier blocks 96% of radiant heat, while the 3 16 thermal bubble layer cushions contents from impact during transport. Lightweight