chest-expander is make of elastic rope,  the tube also can be elastic tube, It passed the ROHS test of  TUV, and also can live up to environment requestment in Occident. Its used for exercise  the chest and arm muscle ,keeping fit and bodybuilding.  There are several size and colors can be chose.

It's very popular in western countries,  it can add the foam handles, and the foam handle is more comfortable, its convenient to carry, perfect in workmanship, simple to operate.

the foam handle is  more comfortale. the tube's material  is natural latex rubber, environment-friendly products.

you can use it out door, in door , in the gym and any place you want. it's very convenient.,