329 Da ultra-low molecular hyaluronic acid serum Long-lasting deep hydrating serum - Deep hydration on the inside. - Moisture soothing - Replenish moisture Feel it in just 3-second with deep hydration - 3-second deep hydration - Skin absorption - 24-hour deep hydration retention 329 Da ultra-low molecular hyaluronic acid Quickly hydrates the skin and boosts moisture with average of 329 Da of Hyaluronic acid, which makes it absorb quickly.