If you're looking for the largest harness possible, or just wanting a comfortable harness for long, hard climbs, meet Petzl's Calidris Harness, which has the largest size range of any of its harness line. No matter the length of your climb, you'll stay comfortable in the wide leg loops and waistbelt padded with perforated foam and 3D wicking mesh that lets your skin breath while transferring sweat away.