Amazon EssentialsMen's Slim-Fit Short-Sleeve Quick-Dry UPF 50 Swim Tee

Will this show off my manly boobs

Im about 260 what size do I need?

how am i supposed to size the shirt when the size chart is for trunks and not shirts?

Is this shirt chlorine resistant--meaning will it keep it's normal fit and elasticity after repeated use in a chlorinated swimming pool?