Abstract: A fire retardant seat pad includes an elastic member which comprises plastic wires which are wound to form a fixed and stereoscopic shape. The plastic wires are fixed to each other at contact positions, and apertures are formed between the plastic wires. The coefficient of elasticity is adjustable during the manufacturing processes of the plastic wires. An elastic body is shaped to be matched with the elastic member. A fire-retardant fabric coat is mounted to the elastic member and the elastic body. The elastic member and the elastic body provide good cushion feature, and the fire-retardant fabric coat makes the seat pad be fire-proof.

Abstract: A racquet string structure with cutting marks contains a string body and a plurality of remarked cut areas separately arranged on plural positions of the string body. Each marked cut area has a length which provides an identifiable cutting portion so that the string body is cut exactly and is inserted into the racquet frame. Thereby, the racquet string structure with the cutting marks of the present invention includes the plurality of marked cut areas on which the color and the at least one character or the pattern is printed so that the plurality of marked cut areas are cut into the plural knitting sections precisely and easily, and the length of each single knitting part is adjusted based on the using requirement so that the plural knitting sections are longitudinally and horizontally inserted into the racket frame to form the mesh surface inside the racket frame easily and quickly.

Abstract: A backpack with an elastic breathable fabric contains a body and an elastic breathable fabric. The body includes an outer surface, a back surface, at least one strap connected with the back surface, a receiving space defined between the outer surface and the back surface, and a contacting portion formed on a central position of the back surface. The elastic breathable fabric, is formed in a mesh shape, has a pre-set tension, and is fixed on the contacting portion of the back surface of the body. Also, the elastic breathable fabric includes a plurality of tiny holes so that the elastic breathable fabric communicates with the receiving space. Thereby, when the elastic breathable fabric contacts with the user's back, it provides breathable wicking function. Also, the elastic breathable fabric has the pre-set tension to recover elasticity quickly, thus reducing carrying pressure to user's body.