Aeros Pillow Cases go over the top of our Aeros Pillows for easy washing or for use with spare clothes or a down jacket as a minimalist pillow alternative. While all our pillows can be machine washed with the valve closed, some of us still prefer a more traditional solution. The Aeros Pillow Case can be slipped over our Aeros Pillows through the 20cm hidden zip, then quickly and easily removed for washing. To prevent slippage during the night, the Aeros Pillow Case's base fabric is compatible with the hook-and-loop fastener patches that will come standard with all Sea to Summit Sleeping Mats from mid-2019. Current Aeros Pillows can be placed inside the Aeros Pillow Case for seamless integration with this new feature.