/u/Iphikrates talks about the spartan errr uniform here

https://www.reddit.com/r/AskHistorians/comments/8wkemp/what_kind_of_body_armor_did_spartan_warriors_wear/

Edit: https://www.reddit.com/r/AskHistorians/comments/8bbgtc/how_should_we_imagine_an_ancient_spartan_soldiers/

I should probably leave this here too since spartans in 300 are depicted with perfectly chiseled abs too