It can be used without any problems. It will be folded for shipping. Natural Rubber Okayama Brainstem N K Cushion Okayama Brainstem Training Institute 《How to Use》 ・Inflate the cushion by blowing air into it, then place it on the floor and stand on the cushion with both feet. ・You can train your brainstem just by standing on the cushion. ・If you can't stand, use it as a cushion to sit on. ・You can easily do brainstem training. ・Core training for athletes (like Mr. Nagatomo) can be strengthened by doing brainstem training. ・Improves athletic ability. You will improve in sports. ・Reduces "falling" (tripping and staggering) due to aging. ・If you're just sitting at home watching TV, do brainstem training while exercising. You will be able to live a long and healthy life.