Buttonholes are still present so it can easily interface with the M-65 but

Not sure what size to get

This fit is high waisted with a full straight leg and features a summery 13oz white denim fabric

and cinches at the hem and waist

Hansen Garments Julian Crew Neck T-Shirt - Indigo Like leathergoods Buttonholes are still present soThe Julian from Hansen Garments is a classic crew neck done with up Hansen's luxurious refinement. A regular fit, classic shape tee, the Julian is finished with a ribbed neckline and cotton herringbone tape at the back neck for comfort and durability. Cut from a 200g mid weight cotton jersey produced in Greece, the Julian is simple, clean, and built for everyday wear.