What is the name of Carhartt's line of stretchable workwear?

Carhartt’s line of stretchable workwear is called Rugged Flex.

Rugged Flex is a Carhartt stretch technology designed to give garments more freedom of movement without abandoning the toughness expected of workwear. The company uses it in products such as pants, shirts, jackets, overalls, and other gear intended for bending, kneeling, crouching, and crawling.

The name is easy to confuse with Carhartt Force, which is a separate family of technologies focused on comfort, moisture management, odor control, and performance in demanding conditions. Rugged Flex specifically points to stretch and mobility. It also differs from Rain Defender, the brand’s durable water-repellent treatment, and Storm Defender, its waterproof-breathable rainwear technology.

Carhartt presents Rugged Flex as a balance between strength and give: the fabric or construction adds flexibility in areas where workers need to move most. That makes the line useful both for physically demanding jobs and for everyday wear when a rigid canvas garment would feel restrictive.