Sleeve stretcher?

I am not sure if your are referring to shaper tees but I have the same problem because I am large shouldered, large backed and the stretch shaper tees bind me at the pit. I have not found a solution except to keep buying and trying them. I tend to take a ton of them into the change room and by the time I am done I feel almost rashed out at the pit area.  Now I just try 3-4 and pretend to swim in them and see where they creep around. I think they get tight around the armpit because we have to have them extra tight everywhere else to get good trunkal compression.  I have a ton of never used Items that I am donating to a LE mission in Haiti.

I am thinking of getting a Wearease slimmer which is a tank but comes high up the pit. This would eliminate the shoulder problem for me and I think I would still get good compression and drainage. Although expensive, the 30 unused garments in my closet was much more expensive. My mom always said do it right the first time even if it is more expensive. I think she is onto something.

See my Pathways thread that I am composing after this message about donating. I finally found a place to donate our used and new stuff and it is to an awesome cause. 

OH, and if you try them, get the lined ones.  More comfortable.