The science
The relevant science here is hydration science, and this formula sits squarely inside it. Glycerin, third on the list, is the most-studied humectant in skincare, with controlled data showing increased stratum corneum water content, reduced transepidermal water loss and improved barrier function with repeated application; betaine, fourth, is an osmolyte that hydrates through a different mechanism, regulating cell water balance, and is documented as less irritating than glycerin on compromised skin, which is why the pair is common in soothing formulas. Panthenol at sixth and allantoin at eighth have the established soothing and hydration records their positions imply.
The hyaluronate system deserves a careful reading because the label invites one. Coreana discloses the lead sodium hyaluronate at 100 ppm, and that figure needs context: high-molecular-weight hyaluronic acid is used in essences at roughly 0.01 to 0.1 percent because of its viscosity, so 0.01 percent is a standard working level, not a token one. The clinical literature on topical hyaluronic acid shows measurable increases in skin hydration and elasticity from leave-on use at concentrations in this range, with the effect strongest for lower-molecular-weight fractions that penetrate the upper stratum corneum and longest-lasting for high-weight fractions that form a surface film. The six additional forms here follow that logic: hydrolyzed hyaluronic acid for penetration, sodium hyaluronate crosspolymer for a persistent film, hydroxypropyltrimonium hyaluronate, whose cationic charge gives it far higher skin retention than the plain salt after rinsing, sodium acetylated hyaluronate for wash resistance, and the potassium salt and free acid as further weights. Each is at a low, undisclosed level, so the system is a refinement over a single hyaluronate rather than a leap, but it is a refinement with a mechanism.
The xylitol complex, xylitylglucoside, anhydroxylitol and xylitol, has published data for increasing the skin's own hyaluronic acid and ceramide synthesis and for sustained hydration, but that data comes from leave-on use over weeks; a twenty-minute sheet captures only the immediate humectant effect. Sheet masks as a format are well characterised in the literature: occlusion under a wet sheet drives a large short-term rise in stratum corneum hydration that decays toward baseline within twenty-four hours unless sealed by an emollient, which is the evidential basis for the advice to moisturise afterward. The botanical extracts at the end of the list have no evidence at their positions, and the absence of fragrance, alcohol and acids is the formula's strongest evidence-based choice for sensitive and compromised skin. In sum: a textbook hydration sheet whose one embellishment is a well-reasoned hyaluronate stack.