Get ready for winter camping with a puffy coat for your tent! The ThermaPuff(TM) Insulation Kit adds a cozy layer of lofted insulation to your 4-season tent. MaxxAir option has magnetic flap for use of roof fan. R-Value: 3.4 Materials: Interior: Challenge RBC200D Recycled Polyester (10 plastic bottles per yard!) Saves about 1lb CO2 per yard CO CWR outside (no fluorocarbons) Water resistant coating inside Recyclable after use Insulation Layer: 3.6 oz Climashield synthetic insulation Made in the USA Strong R value (3.4) and used in Everest expedition clothing Exterior: Challenge RBC200D - Wolf Grey Included in ThermaPuff(TM) Insulation Kit: 1 x Ceiling Panel Mounting Hardware 1 x Headwall Panel 2 x Side Wall Panels 1 x Storage Bag Installation Instructions