Document And Entity Information - USD ($)	12 Months Ended
	Jun. 28, 2015	Aug. 28, 2015	Dec. 28, 2014
Document and Entity Information [Abstract]
Entity Registrant Name	UNIFI INC
Trading Symbol	ufi
Document Type	10-K
Current Fiscal Year End Date	--06-28
Entity Common Stock, Shares Outstanding		17,833,722
Entity Public Float			$ 473,658,614
Amendment Flag	false
Entity Central Index Key	0000100726
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Accelerated Filer
Entity Well-known Seasoned Issuer	No
Document Period End Date	Jun. 28, 2015
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	FY