Get the fabric & supplies you need at OnlineFabricStore: https://www.onlinefabricstore.net/
Want more info on this project, including written instructions? Find it here: https://www.onlinefabricstore.net/makersmill/how-to-cut-foam/
Foam can easily be cut with a serrated knife, like the kind for cutting turkey. If you want to cut foam professionally, it’s worth investing in a foam cutter like the ACU 350 foam cutter which has two blades to produce a fine, reliable cut. Here are some tips for cutting foam.
Shop foam & padding: https://www.onlinefabricstore.net/product-group-foam-and-padding.aspx
For more DIY projects, tips and tricks, check out OFS Maker’s Mill: https://www.onlinefabricstore.net/makersmill/