runsongas
Contributor
I would say that the Jets are similar in weight to the F1's- but the material used in the Jets (pure rubber, basically) make them sink like a rock in the water due to their buoyancy characteristics. The F1's are more positively buoyant and cause my feet to feel and be floaty by comparison to the Jets.
do you have the grey LT version of the F1 by chance? those are monoprene and not rubber. the regular black f1s are rubber and fairly negatively buoyant.