The onion flake material used in the Spark series is processed and manufactured by South Korean companies, with the raw materials sourced from Italy.

The membrane itself employs a grooved composite structure technology, which enhances the texture and luster of the onion flakes under the same reflective area, making them more vivid and bright. Moreover, by using higher-quality, softer onion flakes, the Spark series has resolved the inevitable rough and prickly texture found in similar products. This ensures that Spark products always maintain a soft and skin-friendly touch, to the extent that they can be used to create garments for intimate wear, bringing fashion closer to the body.