You'll want to wear Sweaty Betty's effortless Explorer Jumpsuit on repeat. You'll want to wear Sweaty Betty's effortless Explorer Jumpsuit on repeat. Tamara Hill-Norton founded Sweaty Betty in 1998 after noticing a lack of stylish activewear options for women. Since then, the London-based label has evolved into a worldwide lifestyle brand aimed at today’s woman on-the-go. Each versatile piece is designed to move with your body, offering a sense of empowerment to anyone who wears it.