"单面汗布" can be translated as "single-sided interlock fabric" or more commonly and precisely in the textile industry as "single jersey fabric".
"Single jersey" is a widely recognized term in the textile field for a type of knitted fabric that has a smooth face on one side and a more textured or looped reverse on the other, which aligns with the characteristics of "单面汗布" (a single-faced knitted fabric with a smooth surface).
While "interlock fabric" typically refers to a double-knit fabric with a more stable and less stretchy structure, "single interlock" isn't a standard term, and "single jersey" better captures the essence of "单面汗布".
So, in most contexts, especially when referring to this type of fabric in international trade or textile discussions, "single jersey fabric" would be the appropriate and commonly understood translation.