Portable mat capable of blocking air convection and temperature radiation

A portable mat comprising:

• a first outer covering layer,
• a second outer covering layer, peripheries of the first outer covering layer and the second outer covering layer being joined and closed;
• a plurality of connecting members, the connecting members being connected between the first outer covering layer and the second outer covering layer, the connecting members each having different widths according to high and low positions;
• a blocking unit, the blocking unit including a plurality of blocking layers being located within an interior of the joined first and second outer covering layers, the blocking layers each having an opening corresponding in position to the connecting member so that the blocking layers are spaced apart from each other to form a plurality of spaced spaces not in communication with each other,
• wherein each connecting member penetrates through and out of openings of the plurality of blocking layers, and air convection and temperature radiation in one spaced space are not communicated with the air convection and the temperature radiation in the other spaced space.