for me, it took a few tries to finally settle on my go-to setup, which I'm very happy with on all day rides

thin lined trishorts Zoic Ether Cycling Shorts (no longer available on Amazon?) hmmm, these might be close 2XU Mens Active Tri Short

unlined MTB shorts Zoic Ether Cycling Shorts

this is what they look like IRL


reg. sizing, I use size 38" waist jeans but for these units I buy XXL cuz I'm 60 & weight 230, with a little bit extra in the belly.