Glad to see you have heard about our new tails! If you have any questions, feel free to message us or post here. All of our tails are reinforced with thick silicone and power mesh. The big difference between the two regarding reinforcement is the $2500 tails have more silicone poured in those areas (waist, heels and knee) and another layer of powermesh. This is something we started doing for the mermaids at the Denver Aquarium because they use their tails a crazy amount (12-18 shows a day!), and figured why wouldn't we do it for all of our "higher end" tails