The Voltaire half pad is made of natural felt to absorb sweat and dissipate heat. Inside the felt, there is a layer of shock absorbing foam to protect the back of the horse. The half pad is available in M (16.5 to 18) and L (18.5 and over). It can come in standard or with a front wither riser (B10), or a back riser (D10) Retail price is $290. The Voltaire half pad is made of natural felt to absorb sweat and dissipate heat. Inside the felt, there is a layer of shock absorbing foam to protect the back of the horse. The half pad is available in M (16.5 to 18) and L (18.5 and over). It can come in standard or with a front wither riser (B10), or a back riser (D10) Retail price is $290.