Your Diablo Small Duffel Gym Bag comes with a 5-year warranty. If you need repair, you can grab it.
But for other small gym bags, two things you’ll need are seam grip and fabric repair tape. Clean the area around the hole using alcohol and let it dry. After that, apply seam grip and let it sit for at least eight hours. Then cut the fabric repair tape as needed to patch the hole. Peel it and apply. Seal the edges using seam grip and let it dry again. And voila! The hole in your small gym bag is gone for good.