Sheet and hydrogel masks are intended for short treatments — typically 10–30 minutes (many list 10–15 minutes, some up to 30). Cream or jar-style sleep masks are formulated for overnight or nightly use.
Night masks come in both unscented/no-fragrance and scented variants (examples include lavender, green tea and fresh scents). Some products are explicitly formulated for sensitive or extra-sensitive skin, while others list a broad range of recommended skin types; note that at least one listing warns it is not recommended for sensitive skin.
Typical overnight benefits include deep hydration and moisturization, plumping and smoothing to reduce the appearance of fine lines, barrier recovery and strengthening, reduced redness and puffiness, and skin-tone brightening.
Masks use hydrogel materials and thicker or premium sheet fabrics to improve adhesion. Split, contoured or sturdier constructions and ergonomic cuts are also used to enhance fit and reduce slipping during wear.
