As Irishgal described, you probably *can* sew through it if you want to. I don't know how durable it is without sewing so can't advise there. But, if you wanted to sew it, I'd try a jeans or leather needle, strong thread, and either a wide zigzag or longish straight stitch @ 1/8" inside the edge of each applique. Practice piece first
. Good luck!