Not many things are waterproof in life. Alpinestars has gone the extra length and used a different fabric, 500 Denier, to create a waterproof jacket. The weakest point in a waterproof jacket is the front zipper. This jacket is constructed with a dual flap closing system top keep the wet out. The fabric is very breathable by itself, but when coupled with the front zippered ventilation there is enough airflow on the hottest days. When things cool down, the full-sleeved liner keeps thing warm and cozy. Protection is not sacrificed because of the construction materials. CE approved armor for the elbows and shoulders are incorporated with a foam chest and back protection. Stay safe, stay dry and look good in the P1 sport touring Drystar jacket.