Promois WS-HSIG is a silylated derivative type of hydrolyzed soy protein. It protects and repairs hair, and improves its texture by a heat enhancing effect that results in the formation of a film on the hair in response to heat from hair dryers or hair ironing. Soy protein is distinct from animal proteins such as collagen and keratin in that it is composed of 30% glutamic acid and aspartic acid. Like collagen, it brings high moisturizing property, but it brings a different texture. Additionally, it produces a moist feeling and prevents unmanageable hair. Promois series is peptide, obtained through the hydrolysis of natural proteins, and their derivatives.

Promois WS-HSIG是水解大豆蛋白的甲硅烷基化衍生物类型。它可以保护和修复头发，并通过热量增强效果改善头发的质地，从而在头发干燥器或烫发过程中产生热量，从而在头发上形成一层薄膜。大豆蛋白与动物蛋白如胶原蛋白和角蛋白不同，它由30％的谷氨酸和天冬氨酸组成。像胶原蛋白一样，它具有很高的保湿性，但会带来不同的质感。此外，它产生潮湿的感觉，并防止无法控制的头发。 Promois系列是通过天然蛋白质水解获得的肽及其衍生物。