Strikeforce supplies have the same kit. I tried the sleep bag for size and as I am a big chap it was way too tight for me whereas the British green maggot I settled for has ample room. That said, if you fit inside then you'll find this modular US kit of being of high quality and the sleep bag looks mighty fine in black
I used my green maggot with the gortex bivvy and under tarp several time last winter and was very pleased, too hot if anything and left the bag undone until the 3am chill comes. This time around I am combining it with the
special forces hooped tunnel tent from strikeforce. Using the green maggot without liner or gortex outer at moment, that might change as temperature drop.