Performance bed sheets

1. A bed sheet comprising a circular knitted performance fabric having a plurality of spaced apart ventilation ports, the circular knitted performance fabric comprising at least 50 of the ventilation ports per square inch of the circular knitted performance fabric, the circular knitted performance fabric having a gauge per square inch, grams per square meter, air permeability and material content that are pre-selected to provide the circular knitted performance fabric with one or more selected physical features.

2. A bed sheet as recited in claim 1 , wherein the gauge per square inch is between about 1 and about 15.

3. A bed sheet as recited in claim 1 , wherein the gauge per square inch is between about 15 and about 25.

4. A bed sheet as recited in claim 1 , wherein the gauge per square inch is about 15 or more.

5. A bed sheet as recited in claim 1 , wherein the grams per square meter is between about 75 and about 125.

6. A bed sheet as recited in claim 1 , wherein the grams per square meter is between about 90 and about 110.

7. A bed sheet as recited in claim 1 , wherein the grams per square meter is 110.

8. A bed sheet as recited in claim 1 , wherein the air permeability is between about 600 cubic feet per minute (cfm) and about 900 cfm.

9. A bed sheet as recited in claim 1 , wherein the air permeability is between about 700 cubic feet per minute (cfm) and about 750 cfm.

10. A bed sheet as recited in claim 1 , wherein the air permeability is greater than 736 cubic feet per minute.

11. A bed sheet as recited in claim 1 , wherein the material content comprises a material selected from a group consisting of acrylic, acetate, cotton, linen, silk, polyester, wool, nylon, rayon, spandex, lycra, hemp, manmade materials, natural materials and blends or combinations thereof.

12. A bed sheet as recited in claim 1 , wherein the circular knitted performance fabric comprises at least 100 of the ventilation ports per square inch of the circular knitted performance fabric.

13. A bed sheet as recited in claim 1 , wherein the bed sheet extends from a top end to an opposite bottom end and has opposite first and second side surfaces that each extend between the top and bottom ends, the bed sheet being seamless from the top surface to the bottom surface and from the first side surface to the second side surface.

14. A bed sheet as recited in claim 1 , wherein the bed sheet extends from a top end to an opposite bottom end and has opposite first and second side surfaces that each extend between the top and bottom ends, the bed sheet having a width from the first side surface to the second side surface that is at least 76.5 inches.

15. A bed sheet as recited in claim 1 , wherein the bed sheet extends from a top end to an opposite bottom end and has opposite first and second side surfaces that each extend between the top and bottom ends, the bed sheet having a width from the first side surface to the second side surface that is about 102 inches.

16. A bed sheet as recited in claim 1 , wherein the ventilation ports are arranged in parallel columns, each of the columns comprising a plurality of the ventilation ports.

17. A bed sheet as recited in claim 1 , wherein the ventilation ports are arranged in parallel columns that are spaced apart from one another, each of the columns comprising a plurality of the ventilation ports.

18. A bed sheet as recited in claim 1 , wherein:

the bed sheet extends from a top end to an opposite bottom end and has opposite first and second side surfaces that each extend between the top and bottom ends;

the ventilation ports are arranged in parallel columns that are spaced apart from one another, each of the columns comprising a plurality of the ventilation ports, each of the columns extending from the top end to the bottom end;

one of the ventilation ports in a first one of the columns intersects a first transverse axis that extends from the first side surface to the second side surface; and

one of the ventilation ports in a second one of the columns intersects a second transverse axis that extends from the first side surface to the second side surface.

19. A bed sheet as recited in claim 18 , wherein the second one of the columns is adjacent to the first one of the columns.

20. A bed sheet as recited in claim 18 , wherein the second transverse axis extends parallel to the first transverse axis.

21. A bed sheet as recited in claim 18 , wherein:

the second one of the columns is adjacent to the first one of the columns; and

the second transverse axis extends parallel to the first transverse axis.

22. A bed sheet as recited in claim 1 , wherein the circular knitted performance fabric comprises a plurality of strands, the ventilation ports each have a width that is greater than a thickness of each of the strands.

23. A bed sheet as recited in claim 1 , wherein the bed sheet is a flat bed sheet that is free of any elastic material.

24. A bed sheet as recited in claim 1 , wherein the circular knitted performance fabric comprises a plurality of pores, the ventilation ports being larger than the pores.

25. A bed sheet as recited in claim 1 , wherein the bed sheet extends from a top end to an opposite bottom end and having opposite first and second side surfaces that each extend from the top end to the bottom end, the bed sheet being seamless from the top surface to the bottom surface and from the first side surface to the second side surface, the bed sheet having length from the top surface to the bottom surface that is about 106 inches.

26. A bed sheet comprising a circular knitted performance fabric having a plurality of spaced apart ventilation ports, the circular knitted performance fabric comprising at least 50 of the ventilation ports per square inch of the circular knitted performance fabric, the circular knitted performance fabric having a gauge per square inch, grams per square meter, air permeability and material content that are pre-selected to provide the circular knitted performance fabric with one or more selected physical features,

wherein the gauge per square inch is between 1 about and about 15,

wherein the grams per square meter is between about 75 and about 125,

wherein the air permeability is between about 600 cubic feet per minute (cfm) and about 900 cfm, and

wherein the material content comprises a material selected from a group consisting of acrylic, acetate, cotton, linen, silk, polyester, wool, nylon, rayon, spandex, lycra, hemp, manmade materials, natural materials and blends or combinations thereof.

27. A bed sheet comprising a circular knitted performance fabric having a plurality of spaced apart ventilation ports, the bed sheet extending from a top end to an opposite bottom end and having opposite first and second side surfaces that each extend from the top end to the bottom end, the bed sheet being seamless from the top surface to the bottom surface and from the first side surface to the second side surface, the bed sheet having length from the top surface to the bottom surface that is about 106 inches, the circular knitted performance fabric having a gauge per square inch, grams per square meter, air permeability and material content that are pre-selected to provide the circular knitted performance fabric with one or more selected physical features,

wherein the gauge per square inch is about 15 or more,

wherein the grams per square meter is greater than about 100,

wherein the air permeability is greater than 700 cubic feet per minute, and

wherein the material content comprises a material selected from a group consisting of acrylic, acetate, cotton, linen, silk, polyester, wool, nylon, rayon, spandex, lycra, hemp, manmade materials, natural materials and blends or combinations thereof.

28. A bed sheet comprising a knitted performance fabric having a plurality of spaced apart ventilation ports, the knitted performance fabric comprising at least 50 of the ventilation ports per square inch of the knitted performance fabric, the knitted performance fabric having a gauge per square inch, grams per square meter, air permeability and material content that are pre-selected to provide the knitted performance fabric with one or more selected physical features.

29. The bed sheet of claim 28 wherein the knitted performance fabric is a warp knitted performance fabric or a weft knitted performance fabric.