Waterproof Insulated Bag

This waterproof insulated bag features a three-layer structure designed for temperature protection. The outer layer uses oxford cloth or polyester fabric in 210D or 420D options. The middle layer is made from EPE foam with a thickness of 5 to 8 millimeters. The inner layer uses aluminum foil or PEVA material for insulation improvement. Common sizes include 30×20×25cm and 35×25×30cm. The handles are made from durable webbing, allowing both hand carrying and shoulder carrying. The bag uses a full zipper closure for convenient access. This waterproof insulated bag can maintain temperatures for 4 to 6 hours and is suitable for both hot and cold items. The weight capacity is 5 to 10 kilograms.

The insulation principle of this bag is based on the combination of multiple materials. EPE foam contains many air bubbles that help reduce heat transfer. The aluminum foil inner layer reflects heat energy and improves insulation performance. These three layers work together to slow down temperature changes between the inside and outside environment. Hot food can stay warm, while cold products can remain chilled. The 4 to 6 hour insulation period is suitable for most daily applications, including carrying homemade meals to work or transporting frozen products after shopping.

Sealed Construction for Better Performance

Our sewing workshop pays close attention to sealing quality during the production of this waterproof insulated bag. The zipper area is one of the key points affecting insulation performance. If the zipper installation is not precise, small gaps may reduce the insulation effect. We use reliable zipper materials and carefully control the connection between the zipper and fabric layers.

The alignment of the three-layer structure is also important. The outer fabric, foam layer, and inner insulation layer must stay in the correct position during sewing. Our workers use positioning clips to secure all layers before stitching. This helps maintain consistent structure and stable insulation performance. The coated oxford fabric surface provides water-resistant performance and can be cleaned easily with a damp cloth.

This waterproof insulated bag is suitable for food delivery, cold chain transportation, picnic activities, breast milk storage, and daily meal carrying. Its lightweight structure makes it convenient for everyday use without adding extra carrying pressure. We provide flexible customization services, including different sizes, outer materials, and logo printing options. The minimum order quantity is 500 pieces. Samples can be prepared for confirmation before mass production. Production usually takes about 20 days. Competitive pricing is available for larger orders.