My 18th century source — Women's Undergarments
Women’s Undergarments Sooooooo as asked @misseccentric here is a post about undergarments (I think I’ll make another one for men’s undergarments later!). Basically are 5 garments (pug not included)
Bras less comfy than 17th century corsets?, Blue Mountains Gazette
Underwear in the 18th Century
18th Century Provencal Undergarments Decor To Adore
Underwear in the 18th Century
Confessions of a Costumier: Men's Dressing Guide!
Corsets, crinolines and bustles: fashionable Victorian underwear · V&A
Underwear: A History of Intimate Apparel – DIG
A brief history of men's underwear · V&A
The History and Evolution of Women's Underwear
Waist Lingeries For Girls Korean Underwear Satin Plus Size Briefs
Victorian fashion - Wikipedia