Under Armour Powers their Apparel Business on MongoDB``` The sports apparel brand Under Armour upgraded its online shop's database from a legacy SQL Server system to MongoDB, selecting the NoSQL database for its scalability and agility. The company needed a solution that could support multi-data center replication and sharding, as well as high performance on reads and writes. After building a custom ecommerce system with MongoDB, Under Armour has experienced excellent performance and reliability, particularly in handling large volumes of traffic during holiday seasons. The company's decision to adopt MongoDB has positioned it well for growth over the next several years.