By Doug from North Rocks, Australia – Just used the shinfin™ fins down at Gerroa a few weekends back. They work very well. Used them boogie boarding, snorkeling and body surfing. I usually wear a bootie or at least a neoprene sock. They feel like they provide similar propulsion as I get with my flippers. However the easier kicking motion used for shinfin™ propulsion really puts them far above the flippers. No more sore toe or foot joints. I was able to go all day with the shinfin™ fins without any soreness problem. I will use the fins for snorkeling from a sea kayak, and possibly wearing in a sea kayak to help recovery from a capsize. Good product.