goDog Baliztix Billie Dog Toy, Green Chew Guard Technology is a proprietary manufacturing process that adds a super tough, durable liner to each toy Available in two sizes, Heavy Duty thread to reinforce the seams, Bite Pressure-Extremely high, Fundability Endless All of our toys made with Chew Guard technology are specially constructed for heavy duty use Can withstand extreme bite pressure Dogs are tough but Chew Guard is tougher Chew Guard Technology is a proprietary manufacturing process that adds a super tough, durable liner to each toy Available in two sizes, Heavy Duty thread to reinforce the seams, Bite Pressure-Extremely high, Fundability Endless All of our toys made with Chew Guard technology are specially constructed for heavy duty use Can withstand extreme bite pressure Dogs are tough but Chew Guard is tougher