In recent decades, consumer expectations and behavior have altered, focusing on more comfortable, well-fitting clothes.
Wearing a slim-fitting garment helps to move more freely. Different elastomeric polymers are being introduced as a core
constituent of the yarn to make denim fabric more comfortable during movement. The use of elastic material ensures that
the material is stretchable and recoverable. The performance of several elastomeric hybrid yarns has been investigated
in the first section of this study. Here, polyethylene terephthalate/polytrimethylene terephthalate (PET/PTT (T400®)),
polytrimethylene terephthalate (PTT (Solotex®)), polybutylene terephthalate (PBT), and Lycra® (elastane) were used as
the core component of the core and dual core-spun yarns. After that, 3/1 Z twill denim fabrics were made with these as
weft yarns, and the fabric’s performance was assessed. It is found that dual core-spun yarns were shown to have lower
strength than core-spun yarns, while it had a higher elongation value. PTT/PBT dual core-spun yarn had less unevenness
and hairiness than yarn made solely of elastane. PBT in the core of the weft yarns provided strong strength, dimensional
change, and stiffness qualities in the fabric. In contrast, elastane in the core of the weft yarns provided good elastic
performance. Yarn and fabric performance for the hybrid yarns were statistically significant at a significance level of 0.05.