Which docking system are you using? Stretchy and more durable sounds like a win if they are thick enough to fit in my Si-Tech ring system.I used XL 660 gloves for several years until last year. The nitrile 720s are stretchier than pvc gloves, more durable and I can easily fit my XL Xerotherm gloves inside. I haven't had a puncture nor any 720 pop off when I reach for the ladder the way the pvc gloves did. I'll never go back to the 660s again.