Scubapro Jetfins Size Question

[cashew]

I picked up a pair of Scubapro jetfins XL with spring straps because I needed new fins to fit my drysuit boots.

I have a DUI TLS350 with the new Turbo Tec Soles (which are apparently just like the turbo soles except they have an extra 3mm layer of kevlar on them - see http://www.scubaboard.com/forums/dui/438476-new-tec-turbo-sole.html). I also have a high arch on my foot, which means that I need a tall foot pocket but not necessarily a wider pocket.

My street shoe size is a 7.5 - 8 US women's. With a pair of thick wool socks, it seems like my tec soles fit my XL jetfins pretty well....at the start of the dive. But about 20-25 minutes into the dive (max depth ~75 ft), the fins start feeling like they are a little bit big on my feet and might "slip off" if I flutter kick.

I figure the compression at depth is causing my shoe/insulation to shrink a bit, but I am wondering if I should size down in my fins to compensate for this? My fear is that I won't be able to fit into the foot pocket if I size down to the L since they seem to fit pretty snugly in the XLs at the start of the dive.

 

[CAPTAIN SINBAD]

Jet fins are known for their horrible foot pocket. I was told that Scubapro wanted to make a foot pocket that would only accommodate a scubapro boot and nothing else. They accomplished that somewhat because firstly I could not fit into my drysuit boot so I had to buy new fins for my drysuit. Secondly I could not fit into my wetsuit booties either because they were too big for the Jet fin pocket. I ended up buying a Scubapro boot and now they fit perfectly. I sort of lost respect for Scubapro as a company and would recommend their competitor OMS-Slipstream.

 

[buddhasummer]

I wear a size 8 DS boot although I think not as heavy as your boot, I wore a size L jet. The XL jet was too big. Agree with Cap Sinbad, the foot pocket is horrible. I switched to a small Mares Power Plana and couldn't be happier.

 

[eelnoraa]

It is NOT about bad food pocket on jets here. XL jets are too big for Women size 8 with turbo sole. I think a pair of L will fit better. I use XL for Men's 8.5, cold water, thick socks. XL is just borderline fit/too big.