Black Backpack with Water Bottle Holder and Coin Change Purse

I bought one of these for use at school: books, notebooks, etc., occasionally a laptop. After about 3 months, one strap started pulling loose from the top -the end of the strap is just sewn into the seam there, 1 row of stitches, no reinforcing. I hand-sewed it back in, many rows. Not pretty, but also not visible. Then I started noticing little black flakes in the folder and notebooks. The "waterproof" inner layer was flaking apart from the top area where the backpack material curves. Without that layer, the fabric is thin enough to see through, no water resistance. It''s a cheap price for a cheap pack.