on top, t-shirts are acceptable, though a button-front or polo shirt would be best.
1	on	on	ADP	IN	_	2	case	2:case	Discourse=joint-list_m:72->71:0
2	top	top	NOUN	NN	Number=Sing	8	obl	8:obl:on	SpaceAfter=No
3	,	,	PUNCT	,	_	2	punct	2:punct	_
4	t	t	NOUN	NN	Number=Sing	6	compound	6:compound	Entity=(83-object-new-cf1-3-sgl|SpaceAfter=No|XML=<w>
5	-	-	PUNCT	HYPH	_	4	punct	4:punct	SpaceAfter=No
6	shirts	shirt	NOUN	NNS	Number=Plur	8	nsubj	8:nsubj	Entity=83)|XML=</w>
7	are	be	AUX	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	8	cop	8:cop	_
8	acceptable	acceptable	ADJ	JJ	Degree=Pos	0	root	0:root	SpaceAfter=No
9	,	,	PUNCT	,	_	10	punct	10:punct	_
10	though	though	SCONJ	IN	_	20	mark	20:mark	Discourse=adversative-concession:73->72:0
11	a	a	DET	DT	Definite=Ind|PronType=Art	17	det	17:det	Entity=(84-object-new-cf2-7-sgl
12	button	button	NOUN	NN	Number=Sing	14	compound	14:compound	SpaceAfter=No|XML=<w>
13	-	-	PUNCT	HYPH	_	12	punct	12:punct	SpaceAfter=No
14	front	front	ADV	RB	Degree=Pos	17	compound	17:compound	XML=</w>
15	or	or	CCONJ	CC	_	16	cc	16:cc	_
16	polo	polo	NOUN	NN	Number=Sing	14	conj	14:conj:or|17:compound	_
17	shirt	shirt	NOUN	NN	Number=Sing	20	nsubj	20:nsubj	Entity=84)
18	would	would	AUX	MD	VerbForm=Fin	20	aux	20:aux	_
19	be	be	AUX	VB	VerbForm=Inf	20	cop	20:cop	_
20	best	good	ADJ	JJS	Degree=Sup	8	advcl	8:advcl:though	SpaceAfter=No
21	.	.	PUNCT	.	_	8	punct	8:punct	_
