White cotton detachable collar with lace, featuring transparent buttons. - Color: White - Material: Cotton - Design: With lace - Buttons: Transparent buttons - Style: Detachable collar Thank you for viewing. The above is an AI-generated text. If you can't wear an undershirt under a thin sweater, how about wearing it under a sweater with a wide neckline? It might prevent you from looking bulky. Even after washing, collar stains (yellowing) may appear during storage. Please keep that in mind. I washed and ironed it before listing, and since it's in this condition, I thought there were no noticeable stains, but as time passes from the listing date, they may reappear, so I changed the condition to "Slightly damaged or dirty." Wrinkles may occur due to folding for packaging. Please consider this, and thank you for your understanding of used items.