Poncho UL Tarp
At only 7 ounces, this poncho does triple duty as a pack cover and shelter, too.
The poncho's 15 denier, double coated rip stop nylon stops the rain and snow while providing great ventilation through the side and bottom openings. Easily adjustable to accommodate any pack, or none at all.
As a tarp, it can pitch in a variety of ways, with various combinations of stakes, guys lines and trekking poles, so you can optimize your protection and ventilation depending on your conditions.