Fins bending profile and hardness Analyzed! 

This video analyze the fins bending profile to get the perfect performance from the differend types of body movements and the hardness needing for vary types of spearfishing and freediving!
Regards,
Tasos Chalaris
Contact:
www.xtdiving.com
tasos@xtdiving.com
Facebook: @Xtdivingpro
Instagram: #Xt_diving_official