Howard Wolowitz wore clothing. These are examples of his wardrobe.
S01E12: Keyboard belt
S01E13: Checkered
S02E11 Red/black
Pilot: Nintendo buckle
S01E02: Bat buckle
S01E2: Green Lantern
S01E03: Superman logo
S01E04: Gold Star
S01E07: Shazam bolt
S01E09: Reel to reel
S01E12: 45 Adapter
S01E13:Checker buckle
S01E14: Superman Silver
S02E05: Triple Lightning
S02E06: Billiard buckle
S02E22 Bat on Blue
S04E04: PacMan
Green Lantern 2
S08E15: Lawrence Dobby shirt by Salt Valley
S01E02: Red/Black Vans
S01E11: red Vans
S01E12: Yellow Vans
S01E13: Aqua Checker Vans
S01E14: Pink/Purple Vans
S01E14: Pink/Blue Vans
S01E14: Red/White Vans
S02E04: Black/Blue Vans
S02E06: Red/Black check Vans
S02E06: Orange Vans
S02E07 Purple Vans
S05E23 Princess Blue/Black Vans
S02E07 Grey Vans
S02E08 Gray Vans
S03E02 Blue/White check vans
S03E02 Neon green Vans