We look forward to seeing the results of upcoming collections and hope to see signs of an improvement starting in the second quarter. Our marketing and engagement strategies at AE are centered on creating unique ways to authentically connect with our customers. For example, the essence of our brand platform AE x ME is a collaboration between our customers and our brand. We have real customersco-create our campaigns, which has been very well received and continues to deepen the connection with our customers, fueling positive traffic and customer KPIs.
Although, we are not pleased with our execution in certain areas during 2019, it is important to emphasize that the American Eagle brand has a healthy foundation. Our brand is a clear destination for our customers particularly in our leading signature categories. AE is the number two most popular apparel brand for our customer segment second only to Nike. We continue to see strong traffic to our stores and website and have a growing customer file, including higher retention and reengagement rates. In addition, we have scale, are fully omni-channel capable and generate very strong free cash flow.
In 2020, we are focused on starting to rebuild profitability to a level that better reflects the strength of our brand and our organization. I want to thank the AE team for their hard work and commitment in 2019 as a result of the team’s continued efforts and creativity, I’m confident in our ability to deliver a stronger 2020.
Now, I’ll turn it over to Jen.
Jen Foyle – American Eagle Outfitters, Inc. – Global Brand President – Aerie: Thanks, Chad, and good afternoon everyone. 2019 was a fantastic year for Aerie, marking our fifth straight year of double-digit sales growth. In total, we posted a 28% sales increase, a 20% comp sales growth, higher margins and improved profitability. Aerie grew both its customer base and loyalty program participation at a double-digit rate for the year and also grew on average customer spend. We started this journey several years ago to offer a fresh take on the intimates and soft dressing market. I’ve been thrilled with how the customers have embraced Aerie, the core values that we stand for body positivity, inclusivity and empowerment, continue to resonate with so many customers.
Our merchandise collections have been well received and we are successfully expanding into new areas of growth. Our role models, ambassadors, and events such as #AerieREAL Talk, we are building such a strong community and we’ve broadened our reach by opening new stores in new markets, which also are fueling a strong omni-channel business. I’m so proud of the incredible Aerie team, who make it happen every day, and are working hard to deliver another banner year in 2020.
Looking back at the fourth quarter, it was terrific as well, fueled by a strong holiday offering. Our total fourth quarter revenue increased by 29%, comp sales grew by 26%. This built on a 23% growth last year resulting in atwo-year increase of nearly 50%. The quarter also marked our 21st consecutive quarter of double-digit sales growth. Key performance metrics continued to be very, very healthy. We saw an increase in transactions and a higher average transaction size. This was delivered by a meaningful rise in the average unit retail price. In a highly competitive season, we were able to control promotions, improving our gross and operating margins compared to last year.
Strong performance continues to be broad-based with our major categories delivering comp increases. Our apparel growth was led by strength in leggings, an important loyalty category for us. Our core bras and undies remained consistent growth categories as well. We are also very excited about our product pipeline for the spring season. Our newly launched REAL Good sustainable swim line made from recycled water bottles has been amazing. We are looking forward to building an additional REAL Good sustainable product lines in the future.
We opened 65 new stores in 2019 and closed five, bringing our total for the year to 332. We are seeing very strong returns from our investments in new and remodeled stores as well, including exceptional growth trends in newer markets like Dallas, Houston and Denver. As we have discussed in the past, our store strategy fuels our digital business, which now represents more than 45% of the revenue. We have a robust store opening plan for 2020 with a heavy emphasis on standalone locations and expect to reap continued benefits from our expanded footprint.
In January, we are thrilled to introduce eight new Aerie Role Models to inspire 2020 as the year of change for Aerie. We also continue to grow our network of college brand ambassadors, leveraging existing loyalists to build an authentic presence on campuses. And as we look ahead, we have so many exciting plans to continue to fuel our momentum in 2020 and beyond. I look forward to sharing more details in the future. Lastly, of course, I’d like to thank this amazing Aerie team who live and breathe Aerie’s brand DNA every day, our success speaks to the hard work, passion and talent of this entire organization. We’ve entered 2020 with momentum and we look forward to achieving our milestone of $1 billion in short order.