Refashioned t-shirt (v-neck tank with straps centered in back)

I got a free t-shirt from an event awhile ago. But, at least with my luck, whenever a t-shirt is free it's also several sizes too large. There's a pretty cool graphic on it (which I chose to sloppily cover up in these pictures) so I tried to preserve the shirt and make it into something I could wear.

t-shirt transformed to tank before

t-shirt transformed to tank front view

t-shirt transformed to tank back view