Blastback is a gear perk that greatly reduces damage from your own explosives. It lets you use launchers and grenades at close range without blowing yourself up.
Your own rockets, grenades and Supremo blasts hurt you much less if you are caught in them.
Wear one of the gear pieces that carry it: Impact Gloves MK II. Each piece only takes one body slot, so plan around the other perks you want.
Yes if you use launchers or explosives up close. It saves a lot of accidental deaths.
Pairs well with launchers, Blast Pocket and the Exterminador Supremo.