The PZ3TX is designed to fit tight while accommodating a tri kit underneath. If you find yourself in the middle to lower end of a size based on the size chart then that size is right for you. If you fall into the higher end of a size then you may find going up a size will fit more comfortably.

If you have any questions concerning sizing, don't hesitate to contact us. 
Call us at +1 206 632 1994 or email us at usa@blueseventy.com
We are always happy to help.