4-Part Modular Sleep System - BasicGear
4-Part Modular Sleep System
Average Rating: Average Rating: 4.5 Stars

Camo Green Patrol Bag, Black Intermediate Bag, Woodland Camouflage Waterproof Bivy Cover and Black Stuff Sack.
User Reviews
Yes, It is worth $450. Buy one and you will understand.
Rating: 4.5 Stars
I originally came across this sleeping system in the military. Since then, I have bought one of my own and will recommend it to everyone who either goes camping or wants something in case of emergencies. The only real gripe that I have is with the compression bag. If you try to compress it like crazy (like I do), it will try to escape from the top and the barrel string lock doesn't hold very well. I'm also slightly worried about the straps (stitching) pulling away from the compression bag. But keep it in mind that I try to compress it more than it's designed to be compressed. It's large, comfortable and warm. I've used the entire system in -20 degree weather and still found myself to be comfortable. This thing will blow those cheap $70-100 sleeping bags out of the water. Trust me, you will not be disappointed with this system. No more dragging around super bulky sleeping bags and blankets around with you. I also have one solely in my SUV in case of emergencies.
M. - February 20, 2014

start with the best, forget the rest.
Rating: 5.0 Stars
This is simply the best bag I have ever had. I have owned a few others inc the army issue ICW, adn ECW bags. I bought one of these to try out, I now have 3. I will be placing orders for 2 or so more of them. as I change out my other family members bags' for this one. I use it with the 1in self infateing sleeping pad, it will fit inside the cover and below the sleeping bag so you get to stay on top of your sleeping pad all night instead of wakeing up next to it. having 3 bags in one you cove a wide range of climents, but if you still need colder buy an additional patrol bag and snap into the system or the fleece liner. i have not needed to do this. so far I have used this bag at temps as hot as 90f and as cold as -10f. the olny fault I could find was the cover is made to pull completly over your head so teh bag can shed water. this will be very nice if im cought out with it and no other type of shelter, but most of the I don't like the cove tring to ride up onto my face. I solved this with a small pice of velcro. giving me the option of the cover staying up or down.
Michael - December 5, 2011

last bag i will ever need
Rating: 5.0 Stars
I have owned this sleep system for a few years now and I have to say its the best on the market. I have read the other reviews pertaining to this product and I have one thing to add that I feel was left out. its true the weight of the system is on the heavy side BUT, if you are a year round hiker like me this system will actually lighten your pack. I used to carry a small tent to keep out of the elements and a sleeping bag. but now thanks to this system I can enjoy the outdoors in any weather and not have to lug a tent around with me. also i happen to know that the product advertised on this site is 100 percent authentic military issue. i read some of the others commenting on price but, in this instance you get what you pay for. there are a lot of people selling knock off versions of this system that look very alike. but in my experience U.S. CAVALRY can be trusted.
Michael - December 3, 2010

the bag i never leave with out
Rating: 5.0 Stars
i bought this sleeping bag in 1988 i slept in my truck on a hunting trip and it snow. when i got home i bought this bag and never look back, i have used this bag every where i went in the last 20 years. it have used in the very cold and the warm weather in 15 deffert states. the bag still look the same the only deffert is the booties and the hat that i have never used
marty - May 29, 2010

Pay 400 for this?
Rating: 5.0 Stars
Fantastic set-up- warmest sleep system on Earth in my opinion. But, 400 + dollars for it? I don't think so! I bought my US Military Genuine ECWS Sleep System on E-Bay for 100.00, delivered. If you have money to burn buy one here but they can be had, same quality, cheaper elsewhere. Merry Christmas!
Pat - December 24, 2008

Very Comfortable
Rating: 4.5 Stars
I used this sleep system for over a year in Iraq, mainly the green patrol bag. Very comfortable, very warm, the system is pretty bulky even after it is in the compression sack.
Scott - August 22, 2008

Great Bag
Rating: 4.5 Stars
Best bag I have ever owned. Great versatilitty. Would give it a 5 but price too high and bag with all components too heavy (approx. 16 pounds). Loved mine from the Corps so much, bought one before I left. Aside from down side, would never give it up. (FYI... about $240 at cash sales).
Jason - September 5, 2007

best bag on the market
Rating: 5.0 Stars
The coldest it's been outside when I've slept in this bag is -71. I'm stationed in Alaska. I took the poncho liner into the bag with me and I was great through the night. This is the most versitle bag on the market. You can just take the bivy cover if the temperature is going to be mild, but want some protection from the elements, or you can take all 3 layers if mother nature is out to try and kick your ass. Great sleep system
charles - April 29, 2007

awesome awesome bag
Rating: 5.0 Stars
i purchased one of the sleep systems when i first got it i tryed it out it was a little tight one of my buddys bought it off me and i ordered another 97x37 all i have to say is wow i'm a big boy and i can stretch out no problem we resently went out to the the rock front every thing going good. well the weather changed started getting cold and a lil wet got in my bag as soon as i got in it started dumping for at least five or six hours well when i woke up i had a inch of ice on my bag but the bag kept me dry and warm i give it a five but if you do long hikes it is a little heavy 15 lbs. but well worth the investment big jon
Jonathan - March 10, 2007

best sleeping bag ever
Rating: 5.0 Stars
Last year I conducted training with the John F Kennedy Special Warfare center. Some of my soldiers had the old fart sack sleeping bags when it started to rain. We quickly snapped our ponchos together and made a tarp. One of my soldiers never got issued a poncho so that left him in the rain. Because i was issued a Modular sleep system i let him sleep under my poncho. I slept on the edge of the poncho tent. The rain actually poured off his poncho like a stream right onto my sleeping bag. I have never slept so well, when i woke up the next morning our sergeant was suprised that i was not wet despite that stream pouring right on me. I remember waking up in the middle of the night and feeling a stream roll off my sleeping bag. I would go anywhere, do anything with this sleeping bag. Its the best and i would depend my life on it.
Lotsavon - July 31, 2006

Really comfortable in soggy, cold weather.
Rating: 4.5 Stars
I've had any number of sleeping bags over the years I've been hunting (almost 40) and this sleep system not only makes the most sense in terms of versitility but it really functions well in the kind of day after day cold soggy weather N.Michigan is famous for. We all know goose down is a bust in these conditions, but so are some of the other synthetics used to fill sleeping bags, even expensive ones from stores like REI. I hunt every year on an island in Lake Michigan which is a wilderness area where open fires are not permitted. A slow drying bag in this setting is NOT funny. No problema with this set-up. Like wool, it will keep you warm even if it is damp, and both bags air dry quickly. Had it not been for the rather cramped shoulder area, I would have given it 5 stars.
Nancy - February 3, 2006

awesome sleeping system
Rating: 5.0 Stars
This sleeping system is the best that I have used. This is Marine Corps issued. We used this sleeping system in cold rainy weather with temperatures as low as 17 degrees in Camp Pendleton, CA. Use it in conjunction with the sleeping pad and you will never be cold again.