Kevlar and helmets:
One of the most important role in CS:GO are the Kevlar and the helmet. They protect you from death and stop the shots of some weapons. The Scout (SSG 08) fend off the shots so well, that you no longer die after one shot. In addition they give the player a certain stabilisation if he is shot. This means that the crosshairs moves directly upwards.
The defuse Kit is an essential tool to defuse the bomb, safely and quickly. It can defuse the bomb twice as fast as regular. Should you however die it is not so bad. Firstly, the defuse Kit is not too expensive and secondly, one of your team mates can pick up the item and even use.