Callaway HX Hot Recycled Golf Balls (36 Pack) Package of 36 recycled golf balls with polybutadiene core material 2-piece construction brings ball hot off the clubface for high-velocity distance Hex Aerodynamics construction combines extreme power and playability Soft, durable Thermoset Urethane cover with high-tech core Recycled to highest standards possible; each ball weighs 45.6 grams