설계 불량은 끈 길이가 다르거나, 신발 좌우 크기 비대칭도 있었고 부소재 탈락, 소재변색 같은 하자도 발생했다.
Design defects occurred such as the different length of strap, different sized shoes and also flaws occurred such as the loss of sub-parts and discoloration of the material.