New fabric - new trousers Try our new Bi-stretch trousers - you won't want to take them off again. Bi-stretch has elastane woven into the fabric, making it elastic in both the width and length. These trousers are a simple and safe classic that are your perfect go-to. The trousers also feature a small decorative slit at the bottom of each leg and cheat pockets on the back. A timeless pair of trousers that you can wear season after season.