Yes4All Special Sales Lateral Resistor Trainer with Snap-Block Technology Comfortable, padded adjustable ankle cuffs design Patented X-Safe w. snap-block technology Best in class components & material on Amazon Guaranteed. Heavy duty components and multi-dip Malaysian latex - the highest latex source. Medium resistance level (20 lbs if you pull it 2X from original length) & Shipping weight is aprox. 8 oz Idzo is the exclusive seller for this listing. If you see any other non-Idzo listing, it's a counterfeit or cheap/inferior product. If you accidentally buy it from a non-Idzo (the seller), report the seller immediately to Amazon for a full refund