Purchased at a duty-free shop in the United States in September 2025. On August 27, 2025, La Mer increased the price of the 50mL size from ¥84,700 (tax included) to ¥86,900 (tax included). Capacity/Price (tax included) 50mL - ¥86,900 The box has a slight dent. Focusing on the self-regenerative power of sea kelp. La Mer's The Barrier Serum. Skin is exposed to dryness and air pollution daily, and is also prone to becoming delicate due to cosmetic treatments such as laser treatments and peeling. However, the skin inherently possesses the ability to recover and protect itself. The Concentrate, which is formulated with a concentrated blend of Miracle Broth™, the essence of La Mer extracted using a unique fermentation technology, focuses on the self-regenerative power of giant sea kelp. It soothes and moisturizes the skin, supporting and protecting the barrier function. This is La Mer's best-selling, high-performance, highly moisturizing serum that brings unwavering beauty. With a velvety texture and a soothing fragrance, it gently envelops delicate skin. With each use, it deeply moisturizes from within, leading to skin that is full of firmness.