Pack of 50 Insulated Shipping Envelopes, 8 x 11 Inches. These metallic packaging envelopes help people enjoy their favorite dishes anywhere, anytime. These insulated mailing envelopes preserve the flavor, temperature, and freshness of the food. Up to 48 Hours Control. These metallic mailers offer effective temperature control. The metalized surface of the foil bubble mailer for frozen food prevents temperature loss and food spoilage. The strong adhesive strip ensures a hermetic closure. Cushioning Effect. The inner bubble layer and 180 GSM metal foil of insulated shipping bags for food ensure excellent shock-absorption. Therefore, foil shipping envelopes protect the products from impacts. Stay Dry. Waterproof bubble insulated mailers for cold shipping have a sealed design to avoid leaks. Rain, snow, and splashes will not affect the contents of the insulated mail. Cool insulated mailing envelopes are a smart alternative to lunch boxes. Applications. Metallic bubble mailers are suitable for shipping perishable food and temperature-sensitive items. Thermal mailer is ideal for the safe shipment of ready meals, medicines, and cosmetics. insulated medication mailers snack foam frozen thermal bubble mailer pack metallic foil mailing envelopes self seal cool mailers waterproof cold shipping package insulated bags food cosmetics bag hot pouch small sandwich reusable lunch pouches insulation aluminum large box boxes disposable cooler liner silver freezer mail coolers keep packaging envelope poly assorted wholesale address square padded glitter office packing travel holographic dvd variety sparkle decorative books heavy duty marble buissnes supplies valentine clothes colorful sparkly sizes cute holiday gift cushion shild metalic grade magical lined packages bulk lines shiny parchment freight artwork recycling insulator book cd packet envelops boutique