The product is an injection used to correct moderate to severe facial wrinkles and folds.
The supermodel's image will appear on the company's website and on its information brochures. Van der Wal will additionally serve as the product's spokeswoman for the firm's public relations campaign.
"Restylane is a product in which I truly believe,"said van Der Wal, whose face has graced the cover of many a magazine, including nine Cosmopolitan covers. "Maintaining a youthful appearance is vital to my career, so I was excited to find a natural, non-invasive treatment that can safely erase some of the fine lines I've recently started to notice."
"We are delighted to have Frederique onboard as the new face of Restylane," said Jonah Shacknai, chief executive officer of Medicis. "Her enthusiasm for the product coupled with her immense success in the modeling and entertainment industries and great personality make her a natural choice for us."
Restylane was launched in the US in January 2004 and Medicis claims that its popularity is partly due to the fact it is backed up by scientific studies with clinical data supporting its efficacy for as long as six months.
The product, according to its producers, is the only dermal filler made of the crystal-clear gel called NASHA (Non-Animal Stabilized Hyaluronic Acid), and uses a dual mechanism to correct wrinkles and folds.
When injected beneath the skin's surface, the NASHA gel is said to add volume and lift to smooth wrinkles and folds, it then integrates into dermal tissue and attracts and binds to water molecules to help maintain volume.
The product then, according to Medicis, is gradually degraded by the body's own mechanism and disappears without any residue.
"Results can be seen immediately following treatment and last six months, or even longer," said the company.