For the days where you need to carry a waterproof layer but not sure if you will need it, the Xlite is the answer. This jacket will keep you dry, take up very little room and has a host of features that punch well above its weight.
2.5 layer Hydrafuse Ultralite fabric
Highly packable and lightweight
2 chest pockets
Fully adjustable TunnelTech hood
Hydrafuse UltraLite is a new generation of lightweight fabric that is durable, waterproof and breathable.
Hydrostatic pressure 10,000mm breathability 6,000gm m2 24hrs