Air loss in Aeros Pillows is most frequently due to a puncture, or an issue with the airproof barrier or one of the RF welds.
(most weld or airproof barrier issues are due to moisture from condensed breath remaining in the pillow during longer-term storage. For this reason, we recommend storing your Aeros Pillow unrolled with the valve open).
Aeros pillows can be quite tricky to repair, so replacement may be the best option. If the pillow was purchased online or from an authorised Sea to Summit reseller, this replacement may be covered by warranty, contact us for more information.