Athletic sock

1. A knit sock comprising:

a collar having a perimeter edge around an opening for receiving a wearer's foot;

a leg portion extending from the collar;

a foot portion extending from the leg portion and terminating at a toe end;

an integrally knit ankle welt extending around a circumference of the knit sock and positioned at a lower end of the leg portion; and

a tab located at a back aspect of the ankle welt, the tab integrally knit with the ankle welt; wherein:

the ankle welt has an upper edge and a lower edge, the lower edge integrally knit with the leg portion; and

the upper edge of the ankle welt is separate and spaced apart from the leg portion.

2. The knit sock of claim 1 , wherein an inner-facing surface of the tab is positioned adjacent to an outer-facing surface of the leg portion.

3. The knit sock of claim 1 , wherein the tab includes a tab base, a tab body extending from the tab base, and a top edge spaced apart from the tab base by the tab body, and wherein the tab base is integrally knit with the upper edge of the ankle welt.

4. The knit sock of claim 3 , wherein the top edge of the tab is unattached from the leg portion.

5. The knit sock of claim 1 , further comprising a heel portion positioned between the leg portion and the foot portion, the heel portion having an Achilles section and a plantar section, wherein at least the Achilles section is formed from a knit structure having an alternating pattern comprising a first number of knit courses knit with terry loops and a second number of knit courses knit without terry loops.

6. The knit sock of claim 5 , wherein the first number of knit courses and the second number of knit courses extend from a lateral side to a medial side of the Achilles section.

7. The knit sock of claim 1 , further comprising:

a first plurality of integrally knit grip strips located on a lateral side of the foot portion; and

a second plurality of integrally knit grip strips located on a medial side of the foot portion.

8. The knit sock of claim 7 , further comprising:

a third plurality of integrally knit grip strips located on a dorsal side of the toe end of the knit sock; and

a fourth plurality of integrally knit grip strips located on a plantar side of the toe end of the knit sock.

9. The knit sock of claim 8 , further comprising a heel portion positioned between the leg portion and the foot portion, the heel portion having an Achilles section and a plantar section, wherein the plantar section includes a fifth plurality of integrally knit grip strips that extend from a lateral side to a medial side of the plantar section.

10. A knit sock comprising:

a tubular knit body forming a leg portion and a foot portion extending from the leg portion and terminating at a toe end;

an ankle welt extending around a circumference of the tubular knit body and positioned between the leg portion and the foot portion, the ankle welt integrally knit with the tubular knit body and having an upper edge that is separate and spaced apart from the leg portion; and

a tab located at a back aspect of the ankle welt, an inner-facing surface of the tab positioned adjacent to an outer-facing surface of the leg portion;

wherein the tab is integrally knit with the upper edge of the ankle welt.

11. The knit sock of claim 10 , wherein the ankle welt has a lower edge that is integrally knit with the tubular knit body.

12. The knit sock of claim 10 , wherein the tab includes a tab base, a tab body extending from the tab base, and a top edge spaced apart from the tab base by the tab body, wherein:

the tab base is integrally knit with the ankle welt, and

each of the tab body and the top edge of the tab are unattached from the leg portion.

13. The knit sock of claim 10 , further comprising a heel portion positioned between the leg portion and the foot portion, the heel portion having an Achilles section and a plantar section, wherein at least the Achilles section is formed from a knit structure having an alternating pattern comprising a first number of knit courses knit with terry loops and a second number of knit courses knit without terry loops.

14. The knit sock of claim 10 , further comprising one or more integrally knit grip strips that are knit with a yarn formed of filaments having a diameter from about 25 nanometers to about 350 nanometers.

15. A method of knitting a sock comprising:

during a single knitting event:

knitting a collar having a perimeter edge around an opening for receiving a wearer's foot;

knitting a leg portion extending from the collar;

knitting a foot portion extending from the leg portion and terminating at a toe end;

knitting an ankle welt such that the ankle welt extends around a circumference of the sock and is positioned at a lower end of the leg portion; and

knitting a tab located at a back aspect of the ankle welt such that an inner-facing surface of the tab is positioned adjacent to an outer-facing surface of the leg portion;

wherein:

the ankle welt has an upper edge and a lower edge, the lower edge integrally knit with the leg portion; and

the upper edge of the ankle welt is separate and spaced apart from the leg portion.

16. The method of knitting the sock of claim 15 , further comprising knitting one or more grip strips using a yarn formed of filaments having a diameter from about 25 nanometers to about 350 nanometers.

17. The method of knitting the sock of claim 15 , further comprising knitting a heel portion between the leg portion and the foot portion, the heel portion knit to have an Achilles section and a plantar section, wherein at least the Achilles section comprises a knit structure having an alternating pattern comprising a first number of knit courses knit with terry loops and a second number of knit courses knit without terry loops.