Based on my history with spanx if you really want some compression and slimming effect I’d recommend ordering two sizes smaller than you wear or that’s what works best for me.
Compression Tank Top For Men: Slimming Body Shaper With Tummy Control And Moobs Binder Underwear
48 Review
Length Hooded Bathrobe Housecoat Nightgown Men's Clothing in Sleep & Lounge
55 Review
Arus Turkish Bathrobe XX Large Burgundy
61 Review
SIORO Reindeer Matching Christmas Pajamas for Men - Festive Sleepwear
49 Review