Adjustable bed sheet

1. A material cover comprising: a swath of material having a peripheral edge around a rectangular shape with a width and length to cover a form, said form having a top surface and a bottom surface; a cable sheath disposed about the entire peripheral edge of the swath of material; an elastic cable having a diameter smaller than an inside diameter of the cable sheath and threaded through the cable sheath; a spring loaded cinch mechanism is integrated and disposed along an identical path of the cable sheath, the spring loaded cinch mechanism having an inside diameter being the same or smaller than twice the diameter of the elastic cable thereby feeding two portions of the elastic cable within and through the spring loaded cinch mechanism wherein the spring loaded cinch mechanism clamps and holds the two portions in place under tension; and a pull line formed contiguously from the elastic cable, the pull line extending a length to an ergonomic handle operable by a user; where in the pull line extends from the peripheral edge on the bottom surface to an area outside of the form.

2. The material cover of claim 1 , wherein the swath of material is a bed sheet and the form covered is a mattress.

3. The material cover of claim 2 , wherein the bed sheet is one of a cotton, organic cotton, bamboo, eucalyptus, satin, silk, hemp, rayon, lyocell, and polypropylene or a blend of two or more of those.

4. The material cover of claim 2 , wherein the mattress is one of a crib size, double mattress size, king mattress size, or queen mattress size.

5. The material cover of claim 1 , further including a lock mechanism threaded onto the pull line, the lock mechanism urged toward the spring loaded cinch mechanism to lock and urged away from the spring loaded cinch mechanism to unlock and loosen tension in the elastic cable.

6. The material cover of claim 5 , wherein the lock mechanism is fabricated of a metal or a polymer.

7. The material cover of claim 4 , wherein the cable sheath has sleeve gaps equidistantly located about the cable sheath to discourage or prevent bunching of the bed sheet from being cinched or otherwise secured in place over the mattress.

8. The material cover of claim 1 , wherein the elastic cable is a bungee cord having a diameter of one-quarter inch.

9. The material cover of claim 1 , wherein the pull line is a rope or draw string attached to the elastic cable.

10. The material cover of claim 1 , wherein the pull line is a materially contiguous extension of the elastic cable doubling the diameter of the elastic cable.

11. The material cover of claim 1 , wherein the spring loaded cinch mechanism is formed of a polymer and is configured to compress on the pull line.

12. The material cover of claim 1 , wherein the spring loaded cinch mechanism is fabricated of fabric material.

13. The material cover of claim 1 , wherein the ergonomic handle is attached to an end of the pull line, the ergonomic handle used to pull the elastic cable tight.

14. A method for covering a form in a fitted manner using a swath of material of a width and length to cover the form, the form having a top surface and a bottom surface, the material swath including a cable sheath disposed peripherally and continuously about all edges of the swath of material sheathing an elastic cable attached to or contiguous with a pull line threaded through a spring loaded cinch mechanism, wherein the spring loaded cinch mechanism is integrated and disposed along a same path as the cable sheath the method including:

(a) placing the material swath over the form in a tension relaxed and expanded state;

(b) advancing the elastic cable and material swath past sides of the form;

(c) pulling the pull line through the spring loaded cinch mechanism to constrict the elastic cable by feeding two portions of the elastic cable within and through the spring loaded cinch mechanism wherein the spring loaded cinch mechanism clamps and holds the two portions in place under tension; and

(d) clamping or otherwise locking the created constriction in the elastic cable location where the material swath tightly conforms to and covers the form and the pull line extends from a peripheral edge at the bottom surface to outside the form.

15. The method of claim 14 , wherein the swath of material is a bed sheet and the form covered is a mattress.

16. The method of claim 14 , wherein in (d), a lock mechanism threaded onto the pull line and urged toward the spring loaded cinch mechanism to lock and urged away from the spring loaded cinch mechanism to unlock and loosen tension in the elastic cable.

17. The method of claim 14 , wherein in the spring loaded cinch mechanism is formed of a polymer and is configured to compress on the pull line.

18. The method of claim 14 , wherein the spring loaded cinch mechanism is fabricated of fabric material and has an inside diameter the same or smaller than the diameter of the elastic cable multiplied by two.

19. The method of claim 14 , wherein in (c) a pull handle is provided and attached to an end of the pull line, the pull handle used to pull the elastic cable tight.