Reflectix BP48050 48-Inch-by-50-Feet Square Edge Bubble-Pack Insulation A reflective insulation consisting of two outer layers of 96-percent reflective film, bonded to two layers of heavy gauge polyethylene bubbles (nominal thickness: 5/16-Inch) Heavy gauge polyethylene bubble interior provides superior strength and easy handling Available in a Standard Edge or Staple Tab Edge configuration Staple Tab Edge products are recommended when installing the insulation on 24-Inch or 16-Inch centers Easy to handle and install - no mess, no itchy fibers Only tools required are: staple gun, utility knife, tape measure and safety glasses