Inflatable product, and manufacturing apparatus and manufacturing method therefor

An inflatable product, comprising:

• a first wall,
• a second wall opposite the first wall, and
• a plurality of internal tensioning members connecting the first wall and the second wall, each of the internal tensioning members comprising:
• a first fixing strip fixedly and directly coupled to the first wall;
• a second fixing strip fixedly and directly coupled to the second wall, the second fixing strip disposed in parallel to the first fixing strip;
• at least one thread extending helically around and along the first fixing strip and the second fixing strip,
• wherein first parts of the at least one thread are fixed between the first fixing strip and the first wall, and second parts of the at least one thread are fixed between the second fixing strip and the second wall.