In this study, absorption height, diffusion area and drying tests were proceeded to compare Nylon and cotton brace fabrics' moisture absorption and release property. Results and recommendations were as below. 1. In the results of absorption height test, cotton brace fabric performed well. It showed cotton brace fabric owned better water absorbing ability when comparing with Nylon brace fabric. 2. Diffusion area and drying tests performances of Nylon and cotton brace fabrics weren't well. In addition to cotton fabric for making brace thicker than the fabric for making cloth, unable to exclude absorbed moisture quickly was the main cause. As for the Nylon brace fabrics, their poor performance on drying test result were due to a layer of rubber sponge existed between themselves. 3. For consumers, cotton fabric brace might have the defect unable to exclude moisture and sweat after a long term using causing by its cotton fabric perform well in moisture absorbing but perform poor in moisture excluding. As for the Nylon fabric brace, consumers whose skins were prone to allergies must care its poor performance in moisture absorption and release although its material structure was stronger and could offer better coating and protecting effects. 4. For brace manufacturers, new fabric materials could be used to develop a new brace owing better coating, protecting and moisture absorption & release effects due to cotton and Nylon brace fabric had the defect of poor performances in moisture release or moisture absorption & release.