AntiGravityGear Stratum 55 Top Quilt

AntiGravityGear Stratum 55 Top Quilt
Review by Coy Starnes
January 23, 2020
AntiGravityGear Stratum 55
AntiGravityGear Stratum 55 Top Quilt in my hammock
The improvement in comfort is almost as much as the switch from a tent to a hammock.  OK, that may be stretching it a bit, but it is certainly easier to manage a top and under quilt compared to pads and a mummy bag inside a hammock.  Good hammock insulation tends to run on the expensive side.   However, with a little ingenuity and keeping an eye out for sales a budget setup is possible without investing in a sewing machine.  The AntiGravityGear Stratum 55 top quilt is certainly a budget option that still does an impressive job of keeping me warm.
Description and Specifications 
The AntiGravityGear Stratum 55 top quilt is an economical summer quilt that can also serve as additional insulation by using it inside a sleeping bag or stacking quilts.  As the name suggest, the quilt is rated for 55 F.  I actually never heard this quilt mentioned on the hammock forums I frequent so when I ran across it I immediately did some online research.  I compared the specs on this quilt with several similarly rated quilts.  I had to choose 50 F quilts.  They were slightly wider and slightly lighter, but cost at least twice as much, and sometimes almost three times as much.  I only found a couple of reviews but they were positive so I decided to spend my money on it.  I’ve now used 3 nights and all 3 of those were below the temperature rating.  I’ll get into the details later.
First the specs on this quilt. The quilt is filled with 800 fill power down. The quilt weighs 17.7 oz inside the provided stuff sack.  The stuff sack weighs 0.5 oz and measures approximately 11 x 6 inches with the quilt stuffed inside. The quilt is approximately 76 inches long and 48 inches wide at the very top, interestingly, the specs say 46 inches wide.
AntiGravityGear Stratum 55 Top Quilt
AntiGravityGear Stratum 55 Top Quilt 48 inch top width
The foot end is approximately 18 inches wide and the foot-box comes up about 26 inches from the end.  The quilt is approximately 21 inches wide at the top end of the foot-box.  The quilt features sewn-thru construction laid out in a square like pattern.  Each square, or more precisely rectangle, is 6 inches tall and 4.5 inches wide. The foot-box is connected by a diamond like piece that allows plenty of foot room.
AntiGravityGear Stratum 55 Top Quilt
AntiGravityGear Stratum 55 Top Quilt foot-box detail
AntiGravityGear Stratum 55 Top Quilt
AntiGravityGear Stratum 55 Top Quilt foot-box opening and quilt squares
The tag on the bag says the quilt is made of 46% nylon and 56% polyester and that the fill is 85% down and 15% feather.  The website says it is 800 fill power down and 10% overstuffed.
Use in the Field
I’ve used the quilt on 3 different nights so far.  The low the first night was 44 F.  I wore cotton/synthetic blend sweat pants, a light synthetic pull-over top, medium wt wool socks, some synthetic booties and a synthetic knit boggin.  I was using a 10 F down underquilt.  It was around 50 F when I turned in.  I woke up around midnight feeling a little chilly and added a 10 oz synthetic jacket and stayed warm the rest of the nigh.  The winds were calm and the humidity was fairly low.  A few nights later I went on a similar trip but this time swapped out the underquilt for a much lighter down one rated at about 50 F.  The low only dropped to 50 F and I wore the same clothing as above except never needed to add the jacket.
My last overnighter saw a low of 46 F but it was very windy and the humidity was also high.  I had just got a new synthetic underquilt that only weighs 16 oz.  I’m not going to lie, it is thin and the dimensions are not very generous, and I was really concerned it (the underquilt) would not do the job.  I decided I would give it a fair chance by beefing up my sleep clothing a little.  I wore a thicker pair of fleece sweat pants over a pair of light wt bottoms.  I had on the same socks and synthetic booties.  I wore the same pullover top layer but added a thick button up fleece shirt and the same jacket.  I had on the same boggin but I wore a fleece vest with a hood over all this. I carried some gloves but didn’t need them.  As already mentioned, the wind was howling all night long. When I was hanging my tarp it blew straight out like a flag before I got it staked down.  Due to a packing mishap, I ended up using some shepherd hook stakes instead of my normal v-shaped ones and one blew loose sometime after 3 AM.  I had hung the tarp low and at a steep angle, closer than normal to my side in the hammock, and it had been pressed against my hammock pretty much all night.  Even with the missing stake it didn’t blow the tarp over my hammock so I didn’t notice it until I got up to pack at 5 AM.  I could also feel the wind inside my hammock, not bad enough to really bother me but it was noticeable.  My winter hammock doesn’t have a net so I could reach under the hammock and I could definitely feel the breeze when I reached under it.
The AntiGravityGear Stratum 55 performed pretty much as I expected it would.  At 5 ft 11 in and around 250 lbs I will never pass for skinny.  I am pleased that it is wide enough to prevent drafts along my side in my hammock.  I was a little surprise at how high the foot-box came up under my knees. I expected it to come to about the knees or just above at most, but it comes up almost to my butt.  Even though I’m almost 6 ft tall, I am short legged and wear 29 in inseam jeans. This meant I didn’t have a lot of room to move my knees apart but it still felt much less restrictive than any mummy bag I’ve ever used.  Speaking of which, I have used some high end mummy bags, and while they are great for tent use, I will never use an enclosed bag in a hammock if I can help it.  They are just about impossible to get in while in a hammock.  I was able to get in my hammock and slide my feet inside the foot-box and pull the quilt into position very easily.  Of course, since most quilts don’t have a hood (I know of one brand that has a hood) there is the need to add some type of head insulation in cold weather.
Final Thoughts
And finally, I consider myself a lightweight backpacker, so I was looking for something that would not weigh me down but also wouldn’t break the bank.  This definitely qualifies as a budget quilt.  It list for $79.99 but I got mine For $59.99 when they ran a Black Friday sale.  Right now it is on sale for $69.99.  Even at full price it is a lot of bang for the buck.  There are several synthetic quilts priced similarly but I don’t think there are any $80 down quilts out there that will match its versatility, performance and weight.