This is a procedure in which the whole body is wrapped in a wet sheet, which in turn is wrapped in a dry blanket for regulating evaporation. The blanket should be spread on the bed with its edges hanging over the edge of the bed. The upper end should be about eight inches from the head of the bed. Then spread a linen sheet wrung out in cold water over the blanket so that its end is slightly below the upper end of the blanket. The patient should lie on the bedsheet with his shoulders about three inches below the upper age. The wet sheet should be weekly wrapped round the body of the patient, drawn in, tightly tucked between the legs and also between the body and the arms. The sheet should be folded over the shoulders and across the neck. Now the blanket should be drawn tightly around the body and tucked in along the side in a similar manner, pulling it tightly. The ends should be doubled up at the feet.

A turkish towel should be placed below the chin to protect the face and neck from coming into contact with the blanket and to exclude outside air more effectively. The head should be covered with a wet cloth so that the sculp remains cold. The feet should be kept warm during the entire treatment. If the patient's feet are cold, place hot water bottles near them to hasten reaction. The pack is administered for half an hour to one hour till the patient begins to perspire profusely. He may be given cold or hot water to drink.

This pack is useful in cases of fever especially in typhoid and continued fevers, and benefits those suffering from insomnia, epilepsy and infantile convulsions. It is useful in relieving chronic cold and bronchitis and helps in the treatment of rheumatism and obesity.

The full pack consists of a wet sheet enveloping the body, with a number of dry blankets packed tightly over it, including a macintosh covering or not. In an hour or less these are removed and a general bath administered. The pack is a derivative, sedative, sudorific and stimulator of cutaneous excretion. There are numerous modifications of it, notably the cooling pack, where the wrappings are loose and scanty, permitting evaporation, and the application of indefinite duration, the sheet being rewetted as it dries; this is of great value in protracted febrile conditions. There are also local packs, to trunk, limbs or head separately, which are derivative, soothing or stimulating, according to circumstance and detail.