The C9 Cap is built from C9 Ripstop, an ultralight 100% recycled and recyclable polyester fabric that keeps weight and bulk to an absolute minimum. Despite its featherlight construction, the cap delivers genuine wind and water resistance through a biobased DWR treatment that is completely free of PFAS and harmful chemicals. A slim fit and adjustable back closure make it a reliable choice for running, hiking, kayaking, and water sports where a standard cap would feel too heavy or restrictive. When the cap reaches the end of its life, Houdini accepts it back through in-store recycling units.
C9 Ripstop fabric: 100% recycled and recyclable polyester
Biobased DWR finish, PFAS-free and free from toxic chemicals
Wind- and water-resistant despite ultralight construction
Quick-drying performance fabric
Slim fit with adjustable back closure
Weighs 40g
Fabric produced in Japan, garment made in Estonia
Recyclable at end of life via Houdini in-store collection points
