The paper considers the use of soft containers (MCs) for transporting vegetables, particularly root crops. Until recently, MCs, simply put bags, were used in agriculture to transport goods weighing up to 100 kg. As the proportion of mechanisation is increasing, the use of MCs in larger sizes is becoming more and more important. This article examines the wall pressure of small and large-sized MCs and compares it to the strength of polypropylene fabric. As a result of calculation of pressure on walls of MK it is shown possibility of use of polypropylene PP cloth of various density.