"In another aspect, this invention is a polyurethane foam having a Tg of at least about 35??? C. but below the decomposition temperature of said polyurethane, which foam is the reaction product of a reaction mixture comprising as a major active hydrogen-containing component a polyol having an equivalent weight from about 125 to about 350, a polyisocyanate, and at least 5 parts water per 100 parts o" . . . .