Emilio,
Just a secondary note.
With using Insulated Gloves as PPE, there are a lot of other issues that go along with using PPE such as this.
Such as a test/audit system to make sure that the PPE is being used properly.
Also, with the use of Insulated Gloves there is a requirement that the workers that use them test them before they wear the said Gloves.
What type/brand of gloves are you currently using?.
Are the inners the right size?, as this causes a lot of problems with Trainee Line Mechanics that get the wrong size inners and try and fit a leather glove over a thick Rubber glove.
By rights, you should be able to form a "comfortable fist" with both inners and outers on your hands, if you can't you are wearing the wrong sized gloves!.