The binder materials and the yarn effects were studied in relation to fancy boucle yarns' physical properties namely, yarn effect height, number of yarn effects, and yarn shrinkage and the mechanical properties of weft knitted fabrics, namely the coefficient of static and dynamic frictions and abrasion resistance. Three kinds of ring spun yarns, i.e. 100% viscose, 100% acrylic, and 100% cotton were used as yarn effects and binder yarn and five different kinds of yarns were produced. The core part of all samples was 100% viscose yarn. To knit 1×1 rib fabrics, a flat weft knitting machine with gauge 6 was used. The obtained results showed that the lowest static and dynamic coefficients of friction belonged to samples knitted with cotton effect yarn and viscose binder yarn. The highest value of abrasion resistance in 500, 1500, and 3000 abrasion cycles was observed in a sample with acrylic yarn as yarn effect and binder parts. The sample with 100% viscose yarns showed the lowest value of yarn effect height.  Analysis of variance in 95% confidence level was used to evaluate the statistical difference between the results.