Users frequently report a 'cooling' and 'soothing' sensation upon application, often enhanced by storing the masks in a refrigerator. While the exact temperature drop from ambient storage isn't specified, refrigeration can typically lower the mask's temperature by 10-15°C below room temperature (approx. 20-25°C), intensifying the vasoconstrictive effect that helps reduce under-eye puffiness and inflammation. This contrast is particularly beneficial after prolonged exposure to dry air or strenuous activity.

Retinol, a derivative of Vitamin A, is known for its ability to stimulate collagen production and increase cell turnover, potentially reducing the appearance of fine lines. While specific concentrations are not disclosed, consistent use over 4-12 weeks is generally recommended for significant wrinkle reduction. Early users report improved skin plumpness and a smoother texture within the first week, suggesting an initial hydration boost and mild regenerative effect, though more pronounced changes require longer-term application.

The 'vegan' and 'cruelty-free' certifications confirm that the product contains no animal-derived ingredients and has not undergone animal testing. This means the formulation likely utilizes plant-based humectants and emollients, such as plant-derived glycerin or microbial-fermented hyaluronic acid, to provide hydration and skin conditioning. The brand's commitment aligns with ethical consumerism, ensuring the formulation respects animal welfare and avoids ingredients like lanolin or animal collagen.

The grace & stella masks are offered in a 24-pair pack for $25.95 CAD, resulting in approximately $1.08 CAD per pair. Professional spa under-eye treatments, which may involve specialized serums or equipment, can range from $30 to $100+ per session. This makes the grace & stella masks a significantly more accessible option for consistent at-home use, providing a 'simple little luxury' at a substantially lower cost than professional alternatives.