Mine is very similar to Wundermar's. Two 4x8' sheets of foam insulation board from Home Depot/Lowes. I found a king sized flannel sheet at Goodwill and made large "pillow case" covers to slip over the boards w/regular white sheets for the back side (also from Goodwill). Stapled the ends, and DH built a wood frame to hold it up on the wall off the floor. Also hung a couple brackets above so I can hang a few more quilts in front of it, or hang up my loose felt design wall I've used for years - it's just more floppy than I like when trying to audition blocks. I love the solid design wall. I do use pins for pieces that stay for awhile plus I run the ceiling fans in the summer.