Oh I do 4km walk in the sun every morning and another 4 in the late afternoon. That's been the past year. Its improved for sure but I live in Costa Rica mate, its just harder here. Started raining yesterday. First time in 4 months. Looking at the grill cover wondering if that expensive material actually lasted the full dry season. Its only a year old and was already essentially porous. The water bottles on my bike last 3 months if I leave them outside and then just crumble in hands.