Washing machine hose

A washing machine hose having a first end and a second end opposite said first end, said washing machine hose comprising:

• a connection cylindrical portion positioned on said first end of said washing machine hose for being connected to a drainage pipe of a washing machine;
• an intermediate cylindrical portion disposed along an intermediate portion of said washing machine hose;
• a drainage cylindrical portion formed on said second end of said washing machine hose;
• an annularly corrugated wall formed between said connection cylindrical portion and said intermediate cylindrical portion;
• and
• a scalene-triangularly corrugated wall formed between said intermediate cylindrical portion and said drainage cylindrical portion;
• an integrated double-layered wall having a first layer comprising a soft synthetic resin material and a second layer comprising a hard synthetic resin material, and
• wherein said soft synthetic resin material has a thickness greater than that of said hard synthetic resin material in said annularly corrugated wall and said hard synthetic resin material has a thickness greater than that of said soft synthetic resin material in said scalene-triangularly corrugated wall, such that said scalene-triangularly corrugated wall has a higher rigidity than that of said annularly corrugated wall.