Instead of pulleys , the Soloflex used an elastomer Weightstrap made of heavy - duty rubber to create variable resistance .
Soloflex refers to both the Soloflex exercise machine and to Soloflex , Inc. , the company that created and produces it .
Instead of pulleys , the Soloflex , Inc. used an elastomer Weightstrap made of heavy - duty rubber to create variable resistance .
Soloflex refers to both the Soloflex exercise machine and to Soloflex , Inc. , the company that created and produces it .