SweatyRocksWomen's Long Sleeve Button Front V Neck Soft Knit Cardigan Sweaters

What is the material? Polyester?

Half say true to size other half says it’s kids sizes. What’s the verdict?

How long does it usually take for this item to ship? my item is estimated to arrive by may 18-20. today is may 18th and the item still hasn't shipped

does it unbutton?