A study was performed on the study on the physical properties of Eri union fabrics. Here, the Eri yarns of 2/60s was used as warp and cotton and polyester yarns of 2/40s used as weft to construct the Eri union fabrics using three different weaves namely plain, twill and satin. From the experimental results, it was seen that the strength of the Eri × Polyester plain, twill and satin weaves were better than the pure Eri × Eri fabrics of all the weaves. Although the other properties were also improved when compared with pure Eri × Eri fabrics.