Leader fins FORZA foot pocketsComfortable foot pockets from soft rubber. (TPR). The size of the foot pocket corresponds to the size of bare feet. Please choose the next size if you intend to wear 3. 5 mm socks. Example: Your barefoot is size 43 44 with 3. 5mm socks you should choose 45 46. Foot pocket weights 31 32 =620 gr a pair 33 34 =630 gr a pair 35 36 =670 gr a pair 37 38 =690 gr a pair 39 40 =770 gr a pair 41 22 =780 gr a pair 43 44 =800 gr a pair 45 46 =880 gr a pair 47 48