I tumble dry all my nappies when it's not nice enought to peg out. That's including all my pockets, itty outers and my OBV nappies. Most of my nappies are OBV I'd say tums drying makes them soft and squishy!
I've tumbled most of my nappies at one time or another. Anything with PUL generally gets line dried but I have finished them off with a cool tumble and they're fine. My bamboo nappies (LL, WNNL, WNNN, Bamboozles) have just gone in with everything else on the normal setting and are still lovely and squishy. hth
I tumble everything except pockets as they dry in no time at all. What I tend to do is either hang them on the airer indoors overnight or line dry then give them a 10 min fluffle in the tumble dryer. I tumble all our obv nappies and they are all still lovely. x