noun which may take the genitive case particle 'no'
brand-new (clothes); just out of the box
Describes clothing or fabric that is freshly taken from storage or just purchased and unworn. Often used for items that still have a crisp, new feel.
See also: 下ろす
おろしたてのスーツを着て面接に行った。
I wore a brand-new suit to the interview.
このシャツはまだおろしたてで、一度も
This shirt is still brand-new; I haven't washed it even once.
Rarely used kanji form.
新品 is a general term for any brand-new item, while おろしたて specifically refers to clothing or fabric that is newly taken out and unworn.
From 下ろす (おろす, 'to take down', as in taking new clothes off a shelf) + たて (立て, suffix meaning 'just done'). The exact historical derivation is uncertain, but the word is conventionally associated with newly acquired garments.