By Phia

FORMULA is a beauty and sleep-care brand offering premium mulberry silk pillowcases and sleep masks infused with skincare technology. The brand is known for combining silk with ingredients such as hyaluronic acid and silver ions to support skin hydration and a cleaner sleep surface overnight.

FORMULA shopping guide

Everything you need to know to get the best deal at FORMULA

How to redeem a FORMULA promo code

  1. 1. Add your selected items to your shopping bag at FORMULA.
  2. 2. Open your bag and continue to checkout.
  3. 3. Find the field labeled Promo Code or Gift Card, then enter your code and apply it.

Troubleshooting a FORMULA promo code

  1. • Check for typos — codes are case-sensitive and can’t contain extra spaces.
  2. • Confirm the code hasn’t expired or reached its usage limit.
  3. • Some codes require a minimum spend or exclude sale items.

Expert ways to save at FORMULA

  1. • Use the most valuable code when a retailer does not allow code stacking.
  2. • Check current sale items before applying your code.
  3. • Install Phia to automatically test available codes at checkout.

Stop overpaying at FORMULA

Phia finds the working code — and applies it before you pay.