Pattern for knitting socks

The socks are knitted from yarn with the addition of mohair (or down) 200 g / 100 m with needles No. 3.5. We start with a 2x2 ribbing - 15 rounds. Then the sock pattern (repeat from rounds 1 to 5): round 1 - slip 1 stitch as if to knit with a yarn over, knit 3 stitches; round 2 - all knit; round 3 - slip 1 stitch as if to knit with a yarn over, knit 3 stitches; round 4 - all knit; round 5 - 1 knit, 3 purl. The heel is straight; the toe is a ribbon type.