Personally I would never buy wraps! A GF made me three muslin wraps and they are HUGE (60 inches sqaure) and fantastic. Material shops like Spotlight sell baby muslin, you just hem one side (if you don't have a machine I dont think you'd need to bother).

Pre baby- I bought heaps of wraps (I didn't know the sex of the baby so manchester was my "outlet" IYKWIM!!) but only ever used the ones my GF gave me because they were so light and versatile - and Flynn was born in winter and the light weight nature of them was fine.