I have been out twice now with the winter shelter on my ninox flat lay hammock... it truly is a game changer ... it worked perfectly during a surprise rainstorm in a cold windy day as a pop up emergency shelter for two!! :-)
I love it!!
Next purchase with is a three way tie : ninox fly -or- puffle-or- hot pocket!!!

Can’t recommend Sierra Madré products enough!

I was camping in Big Sur in Northern California in November and brought my under quilt zero degree and top quilt with the Winter Barrier top shield. On the first night, I didnt install the top shield and it was windy. The UQ did a great job blocking the wind but I noticed that when the wind would go over the hammock from the top, it would pull a lot of heat from me. The first night was a bit chilly. On the second night I installed the top shield and did an excellent job blocking the wind. I was nice and toasty that night with no issues. Even if its not "winter" or zero degrees, the top shield does a great job in heat retention and even a bit more privacy when you hang. I am so glad I brought it and it packs down into a small form factor. Well worth the money and a necessary accessory for your Ninox.

Last fall I decided that I wanted to ditch my 4 season tent for my new hammock system and knew I would need the Top Shield. I was not dissapointed with that decision. This definitely extends the temperature rating of your entire set-up and with my faithful pupper inside with me, we were comfy down to 5 degrees. I have used it this spring without a tarp for some wind protection and it was fabulous at that, too. I couldn't recommend the complete Ninox system strongly enough to everyone who would like to try hammock camping!