Final answer:
Stretch denim fabric or lycra-infused denim provides a traditional denim look with the added comfort of stretch yarns like lycra, which enhance flexibility and fitting.
Step-by-step explanation:
The fabric that offers a traditional denim look with added stretch yarns such as lycra is commonly known as stretch denim fabric or lycra-infused denim.
This type of denim incorporates a small percentage of elastane, a stretchy synthetic fiber also known under the brand name Lycra. The primary material in traditional denim is cotton, which provides durability and little stretch.
However, the addition of lycra enhances flexibility and improves the fit, making it a highly sought-after material for comfortable yet stylish clothing.