What dirty sleeping bags are there on business trip?

Nowadays, cotton sleeping bags, cotton sleeping bags and colored cotton sleeping bags are generally sold in the market. Colored cotton is the most unsuitable and heavy, occupying luggage space; Cotton fiber is not as comfortable as cotton, and its thinness is similar. The advantage is that it is cheap. The most comprehensive and cost-effective sleeping bag should be 60 cotton, which is the easiest to carry and has good sleep comfort.