I hate wearing any kind of PFD when I'm paddling in hot weather. I tested the v8 in the most miserably hot and humid conditions imaginable and found it surprisingly comfortable. The buoyancy panels are completely out of the way of the paddle stroke and clear rear cockpit coaming. The soft mesh liner on the inside is comfortable against the skin and allows the vent ports to function well. I found that paddling for hours with this PFD was no nuisance at all and did not feel that it contributed to my discomfort in the heat. I’m happy to have found a PFD that is specifically designed for my kind of climate.