there are LOADS of different options, im using pockets, which is the cloth nappy which has 2 thin layers, the inside is lovely and soft for next to baby's bum, and the outside is also soft, but the inside of the outside layer has a waterproof coating. the nappy has a wee hole at the top of the back which u put the insert into, which looks like a big thick cloth sanitary towel. the pee goes through the first layer of nappy, and gets soaked up by the insert (and leaves the layer it went through completely bone dry, its actually amazing! then u can put a liner (thin and for catching poop) next to their bum too. these are the liners which come in disposable or reusable. for explosive poops, if the liner doesnt catch it all and goes round to the actual nappy (like ours did yesterday) u just soak the nappy in hot water for a little while then bung it in the wash, comes out like new
it really depends on how many times u want to wash them and how many u wud go through in a day! im lazy and only want to wash every 2/3 days, and also if u just have a wee, u can just take out the pee-soaked insert and put in a new cry one, in the same nappy. ive ordered around 25 nappies and 35 inserts (if u buy a nappy tho it generally comes with 1 or 2 inserts) there are sooo many brands out there, from 3.50 inc postage to 30 quid and up! i ordered 5 to see how it went, here a link to the ppl i used:
https://stores.ebay.co.uk/cloth-diaper-nappy?_rdc=1
(they are all auctions, but i havent paid over 1.50 per nappy, most wer 99p)
or heres a seller who is selling 10 + 10 inserts for very cheap:
https://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=190443021603&ssPageName=STRK:MEWAX:IT
most ppl will warn u off ebay cheapies, but i just got a few to try and tbh i cant see any issue with them at all!! (so far)
HTH