Except for leadsuits, there isn't much that will REDUCE the level of exposure.

Protective suits will only provide protection by preventing radiation particles from comming inside your body.
Alpha and Beta radiation are fairly harmless on the outside, but can kill you on the inside.
Gamma wil just go right through you, with or without a suit, but the dose will be reduced if no particles are inside of you. if it's inside you, it will be a permenant radiation source. If it's just on the outside, than it's removeble.

protective suits are only usefull if you know how to use it. I see too many people buying protective equipment and not know how to use them correctly. Those who know, know what type of suit to get.

Please don't buy supples millitary masks, some have reactive cartidges on them, which turns toxic over the years, besides most supples masks are leaky and generally fail testing.

A dosimeter only tells you how much radiation you have received, not the amount of radiation at a certain location. You neet a geigercounter for that.