wear clean and beautiful clothes but avoid pride
The Prophet (sal Allahu alaihi wa sallam) said: “Whoever has pride in his heart equal to the weight of a mustard seed shall not enter Paradise.” Someone asked, “A person likes to wear beautiful clothes and fine shoes.” He replied, “Allah is beautiful and likes beauty. Pride means rejecting the truth and looking down on other people.” [Sahih Muslim]
and about cleanliness,
Abu Malik at-Ash’ari Radi Allah Anhu) reported: The Messenger of Allah (sal-allahu- alleihi-wasallam ) said: Cleanliness is half of faith and al-Hamdu Liliah (Praise be to Allah) fills the scale, and Subhan Allah (Glory be to Allah) and al-Hamdu Liliah (Praise be to Allah) fill upwhat is between the heavens and the earth, and prayer is a light, and charity is proof (of one’s faith) and endurance is a brightness and the Holy Qur’an is a proof on your behalf or against you. All men go out early in the morning and sell themselves, thereby setting themselves free or destroying themselves.
[Sahih Muslim : Book 2 ‘Al-Taharah’ , Number 0432]