Desert Night Camo- that lovely and obsolete camouflage, meant to specifically protect you from Soviet Gen 1 night vision, in the desert, at night. While it seems like a niche use, it was a real concern in the 80s and 90s, especially going into the gulf war. Quickly rendered useless by later generation night vision (its effectiveness against Gen 1 is still disputed) it took over 20 years to reemerge as a cult classic. These DNC parkas are like overcoats, purposely running large in order to wear it over your kit. Depending on how you like your fit, These classics have really dried up.