USGI Surplus UCP Bivouac Shelter Cover (Bivy)

Part of the four-piece Modular Sleep System, the UCP Bivy Cover is an outer shell that is waterproofed with a GORE-TEX lining.  

They say GORE-TEX is breathable, and technically it is but it can get sweaty if you don't manage your layers.  That said, a bivy is essential if you don't have adequate shelter otherwise.  

Used condition, we consider these Grade 2.  You can use DWR wash to help reinforce the waterproofing.

• ACU color is GORE-TEX® waterproof, breathable
  
• Sealed seams
• 2-way YKK® zipper
• Mummy hood for total protection
• Fits military ECWS, intermediate and modular bags
• USA Made
• NSN 8465-01-547-2644
• Weighs 3.4 lbs