Having worn these extensively in hot weather, I feel confident they vent quite well and would strongly suggest trying them out to see how they vent. The way the zipper orients while sitting is different than how they orient while standing just due to pants shifting while you sit.I couldnt agree more. No need for mesh but the hip vents must be placed properly. The vents need to be an inch or two behind the midline of the outside of the leg. The design on these seems like it is really close to the right spot but moving the vent back an inch or two would be ideal. (See picture).
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