ok what fins are good for freediving i have a technique of swimming using my hips long slow strokes my legs are strong i have some old fentura fins i used when i was a scuba fan now they seem very floppy to say the least i got a budget of 50 pounds uk i was after a set that has open foot unless that is the wrong way to go hopefully the ones you say are good are on sale at scubastore as my local shops have outragous prices (3 cars and a lifestyle to keep up)