DAVID ARCHYMens Pajama Shorts Bamboo Rayon Sleep Shorts Soft Comfy Breathable Lounge Pants with Pockets 2 Pack

Are these revealing if worn without underwear?

I'm 38 inches waist, 5.9 ft height, 190lbs. may i order xl...? since the pants contain 5% spandex that will tighten the pants.

I'm around 37.5 to 38. i normally wear large in adidas (36-38) but i'm seeing that large in the chart is 35-37. what size should i get?

Are these hypoallergenic?