The C9 Cap is constructed from C9 Ripstop, an ultralight and highly breathable 100% recycled and recyclable polyester fabric made in Japan. A biobased durable water repellent (DWR) finish — free from PFAS and toxic chemicals — gives the cap wind and water resistance without adding weight. The slim-fitting, adjustable design dries quickly and provides reliable sun protection, making it a practical choice for high-intensity activities including running, hiking, kayaking, and surfing. At just 40g, it sits close enough to the head that you barely notice it.
C9 Ripstop fabric: 100% recycled and recyclable polyester
PFAS-free biobased DWR treatment for water and wind resistance
Weighs 40g
Slim fit with adjustable back closure
Quick-drying construction
UV sun protection via structured brim
Fabric produced in Japan, garment made in Estonia
Recyclable at end of life via Houdini take-back program
