FSTCap Ethereal | Icon CircleC orange All EXPED textile products are

All EXPED textile products are made without intentionally added PFAS since 2025

Made from durable cast iron for excellent heat transfer

Base is reinforced with heavy-duty TPU-coated 600D polyester Oxford cloth

Capacity: ~50g Ground Capacity

you’d be a fool to go out there without it

FSTCap Ethereal | Icon CircleC orange All EXPED textile products areThe most technically advanced cap in Ciele's line up Most caps top out at "functional." The FSTCap Ethereal is built for something more specific the runner who's genuinely thinking about every gram, every degree of heat, every second of drag. The foundation is TERRAstop ripstop stretch woven fabric, which does something most structured caps don't: it forms to the shape of your head rather than sitting on it, giving a locked in feel that stays put