halo hydration

Options include scented formulas and multiple unscented or fragrance-free versions. Some items are noted as "Formulated with signature fragrance," while others are labeled unscented or "No Fragrance Added."

Apply serums in thin layers to slightly damp skin—usually a few drops morning and night—before oils and creams. Several product descriptions advise applying to damp skin and letting the serum absorb before layering other products.

Many products state around 24 hours of hydration; some formulations state longer durations, for example up to 72 hours.

They target a broad range of skin types: normal and oily, dry (including very dry), combination, sensitive, mature, and acne-prone skin.

Common textures include ultra-lightweight gels, gel‑creams, cream‑to‑water textures, and lightweight serums. Descriptions and reviews emphasize fast absorption, a non-greasy or cooling skin feel.