Wore this on a humid 10-miler and it never clung to my back once. The fabric's light enough that I honestly forgot I had it on until the last mile.
George A.★★★★★
The mesh back panel really does dump heat on long climbs, and the fabric hasn't snagged once on brush. Mobility is the standout though — I barely notice it's there when I'm moving fast.
Ruby J.★★★★★
Wore this on a 10-mile trail run in 80-degree heat and it never stuck to me or felt heavy. The armholes are cut wide enough that my stride doesn't catch the fabric at all.