I bought covers for the two chairs/ottomans, a love seat and a table.  They are very thick, and water beads right up when it rains, keeping everything dry underneath.  One seam had pulled apart within a week (about 7-8 inches), and they immediately replaced it (I sent pictures.)  Double checked all the others, and they are fine/strong and holding tight.  I would buy this again, and recommend Wayfair with their incredible return policy.