Opt for top-grain or full-grain leather treated with aniline or semi-aniline finishes, as their breathable pores naturally release moisture better than protected leathers or bonded leather. In humid coastal areas like Queensland, unfinished leathers may absorb excess moisture and develop water rings, while heavily corrected leathers can crack due to reduced flexibility. Australian retailers recommend leather with a breathable coating of 0.1-0.3mm thickness for optimal moisture regulation, and warranties should explicitly cover humidity-related stretching or fading.
Install a hygrometer to maintain indoor humidity at 40-50%, and place leather furniture away from direct airflow from evaporative coolers or windows. Apply a monthly leather conditioner with lanolin or beeswax to replenish natural oils lost in dry air, and use dehumidifier packs inside couch cushions during peak summer (December-February). For homes near the coast, consider treated leather with antimicrobial additives to prevent mold growth in crevices, and vacuum crevices weekly to remove salt crystals that can degrade leather fibers.