Despite trail rumors of fabrics ‘blowing out’, a hole in a fabric is the result of contact with some external factor. Rough surfaces may produce abrasion damage (‘fuzzy’ edges), sharp objects may result in a puncture which spreads as a tear (along the lines of the weave), or as a cut (the line of damage goes across yarns).
Modern technology means that weave errors in production are a thing of the past.
Damage to products is not a warranty issue per se. Depending on the type of stuff or compression sack you have, and the size of the hole, it may well be possible to repair it permanently using a urethane sealant called Seam Grip +WP or Seam Grip +SIL (Ultra-Sil products). Please visit our Blog Post "How to Repair Holes in Your Gear" for step-by-step instructions.
If you have any questions regarding the repair or need a swatch of fabric, please send us detailed photos at firstname.lastname@example.org for further assistance.