4ft x 75ft Double Foil Bubble Insulation Roll - Reflective Radiant Barrier for RV, Camper Van & Industrial Use | Heavy-Duty Commercial Grade Weatherproofing | Tear-Resistant Vapor Barrier | Perfect for Home, Garage & Warehouse Insulation

This is easy to work with, cuts like wrapping paper, is super thin, light as a feather, bendable for any shape, and has R8 insulating properties. I just stapled it to the back of the walls in my cargo trailer and now it stays cool even when hot outside. I highly recommend it!