Kevlar + Helmet:

Kevlar + Helmet is the full armor purchase in Counter-Strike 2, combining body armor with a helmet for protection against bullet damage.

It is commonly bought at the start of a round to reduce the chance of being killed by pistols, SMGs, and rifle headshots, though the helmet only protects against headshots from weapons that do not penetrate it. Players often choose it when they expect gunfights and want the most complete basic defense available.