I really love the Zipster babygrows! The fabric is very soft and the grows are prefect for every weather condition. In summer they are great for UV protection without causing the baby to sweat and when it's colder they are prefect under a sleeping bag. The short sleeved ones are also great - they are even easier to put on and off. The sizes are a little bit weird, though. The NB size fit my completely average baby up to 3 months and the 0 - 3 months size fit from 2 month on. The short sleeved zipsters are one size smaller than labeled - the 0 - 3 month size has the same length from top to crotch as the NB size of the long sleeved ones and the 3 - 6 months short sleeved has the same size as the 0 - 3 long sleeved. Because of that I missed a lot of time with the short sleeved ones, because I sorted them wrongly and only tested the 0 - 3 months size with the 2 month old baby. But I will definitely order more Zipsters in the future (I already have 5 for each size up to 6 months). They are absolutely beautiful and very convenient.