Boveda is available in 62, 65, 69, 72, 75 and 84 (exclusively for seasoning). All Boveda are accurate to +/- 1% of the RH printed on the pack in an air-tight environment. Humidors are not air tight. Depending on humidor quality and ambient conditions, it’s not uncommon for the actual RH to be stable anywhere from 2-6 points below the Boveda RH you’ve chosen. This is why we recommend 72% for your first set after seasoning. If it’s 72 on the nose, you’re perfect. If it drops a few points, you’re still perfect. Based on how your humidor performs, you can decide whether to move to 62, 65, 69 or 75.