pleased you like it. The inside is some thermal batting, one side is silver.
Edging tutorial - easy peasy. Taught to me by Carol Ann Waugh Craftsy class stupendous stitches.
1. Trim all layers to size.
2. Zig zag round edges starting half way down one side. Use thread to match front of piece and set stitch width to about 1.5 and length 1.75. Lower your top tension to 3.25. Keep the edge at the centre of the needle position. Whiz round all sides.
3. Trim any wayward threads
4. Choose edging yarn, rat tail cord or what you like. I used bias fairly loose woven cotton, it's almost scrim.
5. Choose thread to match trim and set stitch width to 3 , length 1.5.
5. Start half way down an edge and place edging next to edge of work but not on it, leave a 1" tail.
6. Position so join is in centre of needle positions so when you sew it'll pull both together.
Start zig zagging but don't put any tension on your trim. Don't worry if bits don't catch you can go over it again.
7. At corners drop needle into fabric or trim and pivot like a ballerina.
8. As you get to last side cut off starting trim at a diagonal and keep going till just past the start.
9. Trim your finish at an angle and done.