Polyester Tents - Should You Buy One?

Waterproof Properties of Polyester

A synthetic fabric’s waterproof properties stem from coatings applied to the inside surface and this is tested to provide a hydrostatic head rating (the pressure required to push water through the coating and fabric).

Whilst this indicates a fabric’s performance, other considerations such as the base materials’ quality and the coatings applied to it also have an effect on the fabric’s waterproof properties over time.

Unlike cotton tent fabrics, the seams of a polyester tent are sealed to prevent water from entering. Unfortunately this means that, whilst no water can enter the tent, nor can any leave. Water vapour becomes trapped inside the tent, creating condensation (though this can be reduced with sufficient ventilation). This is often noticeable in mornings when the tent has been zipped up during the night, and can create some very damp internal walls.

Polyester Maintenance

Water on synthetic tent material treated with DWR

Polyester’s waterproof properties will not be affected by dirt, grease and oil (although substances like aerosol fly killers can damage the coating). They will however have an effect on the DWR treatment used on the outer.

Any dirt, grease and oils should be cleaned off followed by a rinse. Spray on a water repellent as necessary. Reproofing is not a regular maintenance task and any patches losing their waterproofing can be quickly treated with a DWR spray.

UV damage

Any synthetic deteriorates under the sun’s UV radiation. This is accelerated if used in certain areas in direct sunlight – especially over extended periods. While this is accounted for in the manufacturing process, extra protection can be provided by the use of a tarp slung over the tent roof.

Is polyester for you?

Arguably the best synthetic for a tent, polyester is hard wearing and requires less immediate care – although the tent should still be stored clean and dry.

Its light weight and low bulk are perfect for when transport and storage space are limited and make pitching much easier. User friendly properties coupled with relatively low economic price tag make polyester a good fabric for family use.

Pros	Cons
Good tensile and tear strength	UV and heat resistance compared to cotton but better than other synthetics
User friendly maintenance	Non breathable – condensation
Lighter than cotton	No protection from temperature variations
Mildew resistant	Noisy in winds
Weight and pack size	Limited lifespan
Cost

This guide was developed with Outwell, experts in tents and other camping equipment. You can find more information in our other guides, or by visiting their website.

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