The Modular Sleep System Bivy

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[@GruntProof]

Is a bivy water proof? What about a 13 year old one? And here's a special trick or you guys that you probably never knew about!

[@tehunter6569]

23 years, Infantry, ranger, Alaska, Carson, Bragg, 4 Iraq tours. Thats a great way to use the bivy but if all you have is the waterproof bag, the proper way to use it is turn it rubber side out so your clothing and gear are only touching the nylon coating. No stink and it still works.

[@Jason-iz6ob]

This is an unfair test. But we’re gonna do it anyway. Yep, sounds like the Army I remember.

[@darthsarcastus1064]

So, as someone who has packed their ruck the same way from 1995 to present I'd like to share my experience. My spare combat clothes (1x MTP combat trousers, 1x MTP field shirt, 1x MTP UBACs shirt) goes in a large dry bag (civi purchase) along with my socks, underwear, t shirts and any other small clothing items I want to keep dry. These last items are waterproofed together in bags. My sleeping system is in the Bivi bag inside another dry bag on top of my previously mentioned clothes in the center part of my ruck. My self inflating sleep mat is in a side pouch with my tarp shelter, bungees, pegs and para cord. The other side pouch has "ready to hand" wet kit, warm kit (Gore Tex & Snugpak sleeka jacket etc) in a waterproof dry bag and my Jet Boil + gas. Other pockets on my ruck carried wash kit, foot powder, 3 days food and command kit (all waterproofed). I could literally drop my 120 pound (when you add comms kit, NVGs, night sight, binos and spare ammo) ruck in a lake and it would float, just! Seal the whole lot in the bivi bag and it floated fine. My dry bag for the sleeping system I would turn inside out when I needed to sleep in my boots and slide my booted feet into my sleeping system thus keeping the crap off my boots out of my sleeping bag and confined to the dry bag.

[@IronskullGM]

I remember waking up in a ranger grave at Ft. Drum frozen to the ground in this Sleep system. We dug in at an LPOP with a light rain and dropping temps, I woke up in the morning to all my Joes around me laughing because I was frozen to the ground and the zippers were frozen.. Remember to put a poncho over yourself... LMFAO

[@garrett3055]

I've found that the American bivy is $10 cheaper than the Canadian one,. Do what you want with that info lol

[@karlmadsen3179]

I love the MSS with the bivy. I'm 6 feet 1 inch and I don't have the tall version. My feet feel a bit jammed at times, but it's the best gear I've ever used. I tend to use the heavy duty 55gal contractor bags inside my ruck, but I'll use the bivy in a pinch. The rest of the MSS gets compressed like a black hole in space for carrying.

[@smesaric]

Hi, this is some great info! One thing I was wondering though, is when you are using the bivy as a waterproof bag inside your ruck, how would you use it for sleeping during the night while it is raining? Or would you just keep in in the ruck and only use your poncho and ECWCS gear to sleep in the field while raining? Thanks!

[@guglegulag]

Thank you for posting this vid. Since the head-end of the bivy doesn't seal in any way, what is your preferred method for bug/rodent/snake proofing that area? Thanks again!

[@ColemanOutdoors]

Thanks for keeping it entertaining and informative at the same time!

[@jeffrichards5106]

Hey Randall, thanks! what a great tip, I have the MSS bivy, didn't know they were that waterproof. I'll have to use that for my ALICE liner. Thank you sir!👍

[@FFdo.]

awesome test I was expecting v2 of the dry bags but this came out, thanks for the tip, never crossed my mind, I have the same but in ACU so far it has worked well.

[@stamm2366]

this is the best bivy video I know. thank you.

[@torsten4757]

Hi Randall, danke für´s zeigen! Tolle Videoserie, bin schon gespannt was du uns noch alles zeigst. Mein LIKE hast du :)

[@KirkHermary]

Damn that bivy is already looking like a pass. Grunt Proof Labs has some awesome tests going on. I like that you're simulating real world conditions in each test video.

[@turtlewolfpack6061]

Even the newer ACU bivy should pass this test although it is a slightly lighter bag than the woodland and packs up much smaller. I own both and like them both. I also use the Canadian Army sack bivy and the Belgian Army hooped bivy (made by Carinthia and same as the Dutch except the camo pattern).

[@StabbinJoeScarborough]

The Army issued me this complete system and never asked for it back , great piece of kit , ive had it everywhere I went , today retired , I still have it in my closet

[@kennethrosbury2819]

Great job love the video thank you for sharing keep up the good work bye-bye bye-bye bye-bye

[@jimhunt8062]

I learned something new