Portable moist heat system

1. A method of providing a benefit to a user comprising:

(a) providing a portable moist heat delivery system comprising a water vapor generating portion comprising a water vapor source and a heat source; and a water vapor-air regulating portion, said water vapor-air regulating portion comprising a water vapor-air mixing layer, and a water vapor-air distribution layer, said water vapor generating portion and said water vapor-air regulating portion being in fluid communication; and said water vapor-air regulating portion having a latent heat delivery surface disposed adjacent said water vapor-air regulating portion which delivers moist heat at a preselected temperature range;

(b) applying said system to a skin surface of a user wherein the latent heat delivery surface is located proximate to said skin surface of said user;

(c) initiating heating of said system; and

(d) transferring moist heat to said skin of said user at a preselected temperature range, wherein the moist heat is about 15% to about 95% latent heat of condensation.

2. The method of claim 1 wherein said portable moist heat system is applied to a skin surface of a human user and wherein said human skin maintains a temperature of less than about 43° C. during the transfer of moist heat.

3. The method of claim 1 further comprising the step of providing a skin surface temperature of at least about 36° C. within about 5minutes of initiation of heating of said system.

4. The method of claim 1 further comprising the step of delivering moist heat to a tissue and providing a temperature of at least about 38° C., at a depth of at least about 2.5 cm below an outer surface of said skin, within about 60 minutes from initiation of heating of said system, while maintaining a temperature of said outer surface of said skin of less than about 43° C.

5. The method of claim 1 whereby the moist heat provides pain relief within about 60 minutes from said initiation of heating of said system, while maintaining user skin surface temperature less than about 43° C.

6. The method of claim 1 further comprising the steps of providing a pain-relieving active; and delivering said active through said skin.

7. The method of claim 1 providing further comprising the step of generating from about 0.05 mg water vapor/min/cm2 of water vapor generating portion to about 10 mg water vapor/min/cm2 of water vapor generating portion; wherein said water vapor delivers moisture to the surface of said skin via condensation onto said surface of the skin, while maintaining skin temperature less than about 43° C.

8. The method of claim 1 further comprising the step of providing a benefit selected from the group consisting of reducing cardiac work by at least about 4% during a time period said system is applied to said skin of said user; increasing blood flow, in an area of said skin of said user where said system is applied; of from about 3 to about 9 times versus blood flow of said area of skin prior to application of said system; providing relaxation; providing wound healing; providing respiratory relief; providing body warming; providing skin hydration; providing enhanced sleep; providing physical therapy, promoting post-operative recovery, promoting injury recovery, enhancing post-operative recovery, enhancing injury recovery, and combinations thereof.