Unlike gravity camp showers that need to be hung overhead and produce dismal water pressure, Helio rests on the ground and delivers the pressure you need to wash hair, do the dishes, rinse off gear, water your plants, or wash the dog. This high quality innovative portable shower is engineered to last, just like all NEMO products. Helio is a portable shower capable of much more than its competitors. 2.9 gallon capacity. 7 foot hose. 5-7 minutes of water.