The NGT Fortress XL With Hood Overwrap is optimized for use with the NGT XL Fortress With Hood 2 Man Bivvy (bivvy not included!). The overwrap fits perfectly over the bivvy and is 5000HH waterproof. The overwrap comes complete with strong pegs and is finished with sturdy rings at the bottom so you can tightly secure the overwrap for optimal insulation in both summer and winter. You can zip off the door window to create a mosquito net and/or transparent window and the front is also rollable for when you want to wrap the bivvy 1/4 open. Furthermore, a sturdy carrying bag is included for compact transportation and all this for a very competitive price!