Common exfoliating acids include alpha- and beta-hydroxy acids such as glycolic, lactic, and salicylic acid. Hydrating and conditioning ingredients often include jojoba oil, hyaluronic acid, vitamin E, vitamin B3, and various fruit or coconut extracts.
Wear times vary by formula: many masks recommend about 60–90 minutes, while some express formulas advise around 30 minutes. For concentrated peels, visible peeling commonly begins about 3–7 days after treatment.
Electronic foot files are offered as battery-operated models (commonly using AA batteries) and rechargeable models that charge via a docking station or cable; some rechargeable units show charge status while charging.
Many manual tools combine a metal scraping side with an abrasive smoothing side or have dual-sided rasps with coarse and fine grits. Some models also include a residue receptacle or collection feature to catch shavings for easier cleanup.
Common options include regular coarse rollers and ultra-coarse rollers (some with diamond crystals) and multiple speed settings so you can match the roller abrasiveness to skin type and the toughness of hard skin.
Common cautions include using some electric files only on dry skin, warnings that certain devices or peels may not be suitable for people with diabetes or poor circulation, and guidance that chemical peels can increase skin sensitivity and require sun-protection precautions.
