How do insulated coolers work? Key to keeping food and drinks chilled

cooler bags

Finding a quality soft cooler bag is essential when camping outdoors, if only to ensure food and beverages remain cold for as long as possible.


But how are cooler bags insulated? Which materials offer the best insulation properties for coolers, and are these materials eco-friendly?

These are common inquiries when researching cooler bags and their advantages over traditional coolers. From a thermodynamic viewpoint, cold is defined as the absence of heat; so, ultimately, the goal of a cooler bag should not be “keep cold”, but rather keep out heat.

fishing cooler bag

How cooler bags provide insulation:

Cooler bags serve to isolate heat from its environment and prevent its transfer. Coolers often utilize various types of foam insulation materials that act as an insulating layer preventing heat conduction between inside and outside temperatures and reduce temperature exchange between them.


What are the best insulation materials for cooler bags?

Insulation can be an intimidating subject to navigate. There are multiple types of insulation products (cellulose, fiberglass, polystyrene foam and polyurethane among others), each one offering different insulation capabilities; testing methods often lack objectivity while too much information may prove misleading or biased. Although often underestimated as an insulation material for cooler products, polyurethane has proven itself as the superior insulating choice.

High-quality cooler bags use polyurethane foam, which has more compact bubbles compared to polystyrene foam and can be injected directly into cooler bag molds for injection, completely filling all gaps and providing additional strength and durability to the bag. Polyurethane’s high density and insulation properties help minimize heat loss inside, keeping temperatures at bay within the bag itself.


drybagtw Clooer Bag uses double-layered thermoplastic polyurethane material (TPU).

At the core of our soft cooler bag lies an advanced double-layer TPU material, which plays a vital role in providing superior insulation. TPU (thermoplastic polyurethane) is known for its versatility and durability; boasting properties like high strength, abrasion resistance, tear resistance and weather resistance; while its dual coating further increases insulation capabilities making this an excellent option for outdoor enthusiasts.


Insulation efficiency:

A cooler bag’s insulation efficiency depends on a number of factors, including insulation materials, design structure and usage conditions. High-quality cooler bags that use polyurethane foam insulation tend to offer superior insulation performance; however, its effects are influenced by external temperatures, sealing level of the bag and any additions of ice or cold packs; for extended insulation needs it is advisable to choose thicker insulation layers as well as using cooling agents in order to extend this period of time.

lunch cooler bag

Environment friendliness:

Polyurethane is an environmentally-friendly material with renewable and recyclable properties, helping reduce dependence on natural resources during production, while being reused, thus lessening negative environmental impact. Therefore, opting for polyurethane cooler bags not only provides excellent insulation properties but also aligns with sustainable principles.


Tear-resistant and easy to maintain:

Outdoor adventures can be tough, which is why our soft cooler bags have been designed to be tear-resistant – capable of withstanding all of the challenges you face along the way. You can confidently take it along to beach picnics, hiking trips and camping activities as it can withstand various tests along the way. Furthermore, they are easy to maintain after your adventures have concluded thanks to their easy cleanability!


Selecting an effective ice retention cooler bag:

When looking for an outstanding cooler bag insulation performance, we advise selecting products made from polyurethane foam insulation material. With its high density, excellent insulation effect and environmental friendliness properties, polyurethane cooler bags offer long-term thermal control in various outdoor activities while keeping food and beverages cool and chilled for as long as possible.


Take into consideration design and functionality:

Design and functionality should also be key considerations when selecting a cooler bag. A high-quality model should have a waterproof outer layer to block sweat penetration while its interior should be lined with leak-proof materials to ensure no liquid leakage, keeping your food and items chilled at all times. Furthermore, tear resistance and easy cleaning features of such bags allow them to handle the rigorous conditions associated with outdoor adventures.


cooler lunch bag

Conclusion: the insulation performance of a cooler bag largely depends upon its materials, design, and usage conditions. When selecting a bag with polyurethane foam insulation combined with waterproof, leak-proof, tear-resistant design features that offer outstanding insulation performance and durability, you are more likely to achieve optimal performance and durability. When purchasing one for outdoor adventures it is advisable to carefully consider all these factors in order to get one that provides convenience and pleasure – an insulated cooler bag is an essential tool!