I don't know if you own any figures with that sort of capes, I used to say I didn't mind those capes either until I got Saitama, and those capes are ****ing horrible, you will not be able to make your figure stand on its own, you'll always need a stand because the construct and joints make the cape very heavy, and will have to hide the joints and the gaps, it's just not fun and it doesn't look any cooler than a static sculpted cape, it offers more of a struggle than added playability.
I'm sure a fabric cape would work with the proper selection of fabric, like a small fiber slightly metallic fabric.