With microfibre the fluid is held between the individual filiments, rather than absorbed inside the fibre, so the fluid spins out during the laundry process, a quick air dry and they are ready to go again.
Microfibre do need to be changed more often to stop the chance of compression leaks, but as they are so quick to launder you don't need a bigger stash.
The microfibre nappies are cut from the same pattern as the LittleLamb cotton and bamboo nappies but due to the nature of microfibre they are slightly bulkier.
The size 1 fits babies from around 7lbs - 20lbs (3kgs - 9kgs)
The size 2 fits babies from around 20lbs-38lbs (9kgs -17kgs)
Microfibre nappies aren't available in size 3.