TIRTIR SOS Serum is a highly hydrating product formulated with polyglutamic acid that delivers plump, healthy looking skin. Just like many products of this brand, SOS Serum is very lightweight and absorbs instantly, which intensifies the effect. The formula is also designed to improve wrinkles and fine lines as well as strengthen skin barrier. A whole bunch of calming and soothing ingredients, such as centella asiatica, chamomile, and cucumber extracts, contribute to skin's healing and calming.