The 250 is the latest evolution of the fin footpocket created by C4. The features that make it unique are:
Very low weight of only 250gr thanks to the TPE 75 ShA material overmoulded on a rigid high modulus TPE insole;
Thin thicknesses that increase comfort and do not cause foot pain;
Comfortable 3° pre-shaped fit;
Blade assembly, without side horns, with a sturdy M6 screw on a hand grip nut;
Hydrodynamic shape and reduced dimensions that make it glide effortlessly in the water.