The C9 Cap is built from C9 Ripstop, an ultralight and highly breathable 100% recycled and recyclable polyester fabric designed for activities where a standard cap would feel too heavy. Despite its minimal weight of just 40g, it offers genuine wind and water resistance along with fast drying performance, making it suitable for running, hiking, kayaking, and water sports. A biobased DWR treatment keeps moisture at bay without the use of PFAS or other harmful chemicals, and an adjustable back closure ensures a secure, customizable fit.
C9 Ripstop fabric: 100% recycled and recyclable polyester
Biobased DWR treatment, PFAS-free
Wind and water resistant
Weighs 40g
Quick-drying construction
Slim fit with adjustable back closure
Fabric produced in Japan, garment made in Estonia
Recyclable at end of life via Houdini take-back program
