Double-layered core: Outer softer silicone keeps SpinFit signature comfy wearing experience. Inner harder silicone makes W1 more stable when the ear tips are installed on earphones.
W(wave)-shaped design: Reduce the pressure from outside Enhance the noise isolation function.
Recommend earphones style-Multiple drivers and big dynamic driver earphones. W1 fits perfectly on big and heavy earphones due to the stability the design gives. Compatible with the same earphone groups as CP145.
For now, Spinfit W1 can buy separately (1 pair only).