i put stabilizer (interfacing/fusing) on the shirts with the intention on that putting off stretching of the tees
picking out which one to pick (non woven, woven, heavy, light weight) was the hardest part because i still know nothing about them... i picked the pellon one with the pinkish label (b/c as i understand it pink = fusible) that had mid or light weigh on it
i ended up not buying enough the first time, and then when i went back, i could not find the same one, but did get something similar which worked
imho the worst part about the stabilizer was the ironing of it on