of the wearer 39 s heel which the sock supports and cushions third knit portion 12 also distributes moisture to the second knit portion yet to be described the channeled second knit portion 13 at the instep and over the instep of the sock is located between the toe portion 11 and the heel portion 12 moisture absorbed from heel and toe regions is transferred to the second knit portion and on to the exterior thereof as by wicking and evaporation and through vent holes in a surrounding shoe see for example fig6 showing a section 13 a of second knit portion 13 and moisture flow paths 14 from section 13 a through vent holes 15 a in shoe section 15 again similar to the channeled design of first knit portion 11 the channeled second knit portion 13 includes the plurality of alternating finger or channel portions 13 c that extend generally forward in a direction from the heel section toward the toe section these channels are alternately spaced and oriented to mesh and interlock with the channel portions 11 a of the first knit portion forming the increased surface area contact interface 16 therebetween this interlocking channeled design significantly accelerates and improves the amount of moisture drawn from the first knit portion 11 and distributed to the second knit portion 13 by increasing the surface area of the hydrophilic and hydrophobic yarn interface 16 to be described as shown the first knit portion 11 is contiguous and joined edgewise or coursewise to the second knit portion 13 at interface 16 extending about the sock forward of the instep fig2 best illustrates that the alternating channel portions 11 a 13 c of hydrophilic and hydrophobic yarns work to respectively absorb and transfer the moisture absorbed by the hydrophilic toe zone.