fujimaru ritsuka (male) (polar chaldea uniform)
Male Ritsuka's version of the Polar Chaldea Uniform worn as a Mystic Code in Fate/Grand Order, introduced into the story during the Russian Lostbelt to help the protagonist survive in severely cold conditions.
For Female Ritsuka's version, see Fujimaru Ritsuka (female) (Polar Chaldea Uniform).