Here's what you need to fix your waistband:
-new elastic (1" wide feels best)
-seam ripper, safety pins, needle & thread
-knit fabric & sewing machine (if the fabric is worn out)

Links to the materials & supplies I used in the video*:
My pressing/ironing mat https://tidd.ly/3Vd3RtH
My rotary cutter (same brand): https://tidd.ly/3EZ7HQq
My self-healing mat: https://tidd.ly/3VKgs7Y
Beginner sewing kit: https://tidd.ly/3UtxK8o
Organic cotton fabrics like the ones I use: https://tidd.ly/3VkJRWx
Sustainable cord/twine/rope: https://tidd.ly/3UmEaGf
Where I get my organic cotton No Trace tags: https://tidd.ly/3Ffa9DL
Organic cotton thread, elastic & more sustainable notions: https://tidd.ly/3VKAz5H

These are affiliate links, which means if you purchase this I'll receive a small commission.

If you’d rather shop on Amazon, check out these links*:
Wool ironing mat: https://amzn.to/3VCML9a
Rotary cutter: https://amzn.to/3FrCjdV
Cutting mat: https://amzn.to/3VX9IDS
My sewing machine: https://amzn.to/3F5Y2HR
My favorite sewing machine for beginners: https://amzn.to/3VBN445
These are affiliate links, which means if you purchase this I'll receive a small commission.