About this item Pack of 100 Insulated Shipping Envelopes, 8.5 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. › See more product details