The purpose of this study was to produce 100% recycled denim without a tradeoff in quality according to zero waste concepts. Initially, the waste points from raw materials to final product in denim fabric production process were determined. Then, denim fabrics were produced from post-industrial (recycled cotton fibers obtained from denim wastes) and post-consumer wastes (produced from recycled PET bottles). Classic cotton fibers and alternative regenerated cellulose fibers (Tencel (R)) were used as carrier fiber in addition to mentioned fibers for eliminating recycled fibers disadvantages. The effect of fiber types on yarn or fabric characteristics were investigated in accordance with planning design and construction. Furthermore, the relationships between fibers and yarns/fabric results were statistically evaluated using correlation analysis. The results of this investigation show that the amount of fibers have a significant effect on yarn unevenness, thick places, neps, hairiness, air permeability and abrasion resistance of the samples.