This review is only from a mouth of constant swimming in both fantasea fin and skin. The fantasea fin was used 4 times a week over a course of a month and each time I swam for about an hour to hour and a half. The skin was only used 2 times per week over a course of a month. If you have any other questions about the skin or fin you can leave in the comments and I'll try to answer them to the best of my ability.
