Sea to Summit Air Sprung Cell mats use an advanced manufacturing technology that is extremely resilient to moisture. The airproof barrier also includes an anti-microbial compound that prevents mold from growing inside the mat.
In the very long term (many, many years of normal use), moisture from condensed breath could possibly weaken the air-proof barrier inside the mat. For this reason, using a pump to inflate a mat, and storing it with the valve open to allow any internal moisture to dry out is recommended.
Since Spring 2018, our Air Sprung Cell mats are supplied with an Integrated Pump Sack which significantly reduces the amount of condensed breath in the mat. We also recommend using an Air Stream Dry Sack Pump for ‘topping off’ SI mats.
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