The research aims to analyze the types of Lycra fibers and different ratios mixed with cotton fabrics, Identify of the effect of different mixing ratios Lycra fibers on the physical and mechanical properties of cotton fabrics, Identify the most important problems facing the garment manufacturers of Cotton blended fabrics Lycra, and put some proposals to address the problems which faced the production of ready made garments of Cotton blended fabrics Lycra different mixing ratios, Identify physical and mechanical properties affecting the sewing quality of Cotton blended fabrics Lycra different mixing ratios, measure the impact of variables (Material-stitches-density of sewing thread) on the sewing quality of Cotton blended fabrics Lycra different mixing ratios,the research sample consisting of four types of Cotton blended fabrics Lycra different mixing ratios (Polyester/Lycra,Cotton/Lycra) mixing ratios in the weft thread (10%,15%) and mixing ratios in the warp thread (100% Cotton), research tools Included testing laboratory of the properties of physical and mechanical of Cotton blended fabrics Lycra, also included questionnaire addressed to manufacturers of ready made garments from Cotton blended fabrics Lycra to identify its sewing problems
 
 
 
 
 
 
 
One of the main search results there is an indication moral effect mixing Lycra cotton blended fabrics of the research agents (Stitch type, Sewing thread Count) on the  seam strength, it became clear that seam stitch 301 Ls was the best of the stitches on the study in terms of the seam strength, and Sewing thread Count was the best with 30/3, It is also One of the main search results there is an indication moral effect mixing Lycra cotton blended fabrics of the research agents (Stitch type, Sewing thread Count) on the seam slippage, it became clear that seam stitch 301 Ss was the best of the stitches on the study in terms of the seam slippage, and Sewing thread Count was the best with 30/3.                                                            
One of the main recommendations of the study to take advantage of the search results in the field of ready made garment industry to improve the quality of final products from Cotton blended fabrics Lycra by identifying the best stitch type and the best sewing thread Count, Deepen and broaden the studies in the direction of seam quality in order to confirm the quality standards and access to the required level, And the link between academia and organizations, and between companies and garment factories through research applications to gain access to the best performance of the clothes made of Cotton blended fabrics Lycra.