Question Why don’t drysuits have calf/ankle dump valves?

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I am still deciding on which one. Water gets chilly in Oki for the next couple months so it’s a good time to learn. I’d rather figure out deysuit on a nice subtropical island rather than figure it out when I get back to the inky waters of the Puget Sound
I have a Seaskin.. pretty good size following on here. You can read all about them. I'm very happy with mine, probably best bang for your buck.

There are other drysuits, maybe even some that are nicer, but at the end of the day I'm still dry and that's what matters!
 
I’m looking at drysuits, it seems like it would help with inversion(?)

Not a question of concern, more just curiosity

Because in the trim position basically any air added to the suit would dump out a valve down there almost instantly and your upper body would stay cold and squeezed
 
Another for a made to measure suit.
I have small calves/ankles. An off the peg drysuit is over sized in that area. I fought it for years, got drysuit gators that helped a lot. Eventually got a made to measure. No gators needed. No floaty legs. That is probably the best part of the made to measure suit. With that, no need for tricks to make a poor fitting drysuit work good enough.
 
+1 for made to measure unless the off the shelf is a perfect fit.
 
I’m looking at drysuits, it seems like it would help with inversion(?)

Not a question of concern, more just curiosity
As a new drysuit diver, this sounds like a good idea. Your biggest fear is inversion, it seems to happen at the drop of a hat, and it's hard to recover from.

By the time you have 50 drysuit dives (less for some people), you will wonder why you ever worried about it. Preventing it will be reflexive, and the few times it happens, you'll recover easily. By 100 drysuit dives, you'll start to find it hard to even relate to people who worry about it.
 
I seem to remember back in the day that the shop I worked out of sold Apollo Neoprene drysuits that came stock with ankle valves...
 
How's diving in Oki? Is there a better time of the year to dive there or is it all the same please?
Okinawa is one of the best places to dive in the world. Pretty much the entire island is surrounded by reef to some extent or another. Japan has a marine national park about an hour boat ride off the west coast of the island that will ruin every other dive site you’ve been to. The water is beyond clear year round. I’ve stood on the deck of the boat and been able to look down and see the reef at 50ft.

Diving in the winter is “cold” but we’re talking the water being in the low 70’s. Most of the locals will do a drysuit if they go from Dec - mar. Summer (may June July) is by far the best time, followed by autumn, but in Sep/Oct (and beginning of November) there’s a damn typhoon every other weekend. :(
 
Okinawa is one of the best places to dive in the world. Pretty much the entire island is surrounded by reef to some extent or another. Japan has a marine national park about an hour boat ride off the west coast of the island that will ruin every other dive site you’ve been to. The water is beyond clear year round. I’ve stood on the deck of the boat and been able to look down and see the reef at 50ft.

Diving in the winter is “cold” but we’re talking the water being in the low 70’s. Most of the locals will do a drysuit if they go from Dec - mar. Summer is by far the best time, followed by autumn, but in Sep/Oct there’s a damn typhoon every other weekend. :(

I am going there then. Thank you for the information.
 
https://www.shearwater.com/products/teric/

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