The Aeros Pillow Cases can be placed over the Aeros Pillows from Sea to Summit and easily washed in the washing machine. When stuffed with clothing, they also serve as a minimalist alternative to a regular pillow. Although all Sea to Summit pillows can be washed in the machine with a closed valve, many prefer a traditional solution. The Aeros Pillow Case can be easily put on and taken off using the 20 cm wide hidden zipper. All Aeros Pillow Case bottoms feature a PillowLock hook-and-loop fastening system and can be attached to any Sea to Summit sleeping mat from the 2019 series.