50-60 lbs is on the low side, mine takes 155 more than my raw max just to touch. it depends on how tight you wear it and how strong your lockout is, most people are getting 75-100 out of them, that wear them correctly. 150 is not out of the question. and yes im talking single ply. they do not blow easily. they have very strong stiching. the ones that are blowing are guys using them super super tight, to get the great carryover, and anything will blow when you do that. and yes you will hear of more rages blowing than say a metal poly or a fury, but there are 20x as many people using them as compared to other shirts. i have used almost every shirt made and this is the best shirt i have used by far. and for fast service, try irongladiators ( brent mikesell), house of pain, or powerlifting superstore. all have great service.