Hardtuned Puffers do have extra material to bulk out the fit.

If you are wanting a smaller / slimmer fit, we recommend sizing down one

XXS XS S M L XL 2XL 3XL 4XL 5XL
Height - - 67 70 71 75 77 77 80 82
Width - - 53.5 56 58 60 62.5 64 67 69
Measurement guide tank tops

Width: Measured armpit to armpit.
Height: Shoulder to hem.