Compared to the Mares Head Volo One Open Heel Fin, just a bit heavier when held. But once you submerge in the water, initially you nearly have to check if they are on…very light, excellent for combat swimmers.
PRO: Energy conversation very noticeable; no complications with kicks nor ankles using these fins. Once the straps are adjusted, you can slip them on and off w/o unbuckling the straps. Minimizes leg fatigue, excellent for long distance swimmers.
CON: As with the Mares Head Volo One Open Heel Fins, not a lot of immediate thrust noticed, but excellent momentum maintained w/o stress or enhanced O2 consumption…