The hoods have drawstrings and the ends of the arms are stretchy so it keeps the water from getting your sleeve wet.
They are cheap and they price and workmanship matches. This is an inexpensive rain coat but you could get several uses from each of them. Having them on hand for outdoor concerts is reasonable.
Just let them dry on a hanger before you fold them up and put them in a bag. They could certainly do the job they were intended for.
Item name: Rain coat 5pcs
Material: Peva rubber
Clothes length: 45.3 inches
Sleeve length: 30.3 inches
Bust: 51.2 inches
Package size: 7.9 inches * 2.8inches * 10.6 inches
Color: Blue, Pink and Orange, choose one either
Note: Measures data under the tile, there may 0.4 to 0.8 admissible error.
Package list: 5pcs * rain coats