Frelaxy Ultralight Sleeping Bag Liner - Lighter & Compact, 3 Sizes Travel Sheets & Adult Sleep Sack, Comfy Breathable & Cooling & Silky Soft, Quick-Drying, for Backpacking, Hotel, Camping, Hostels

Got this for my kid to take to hostels & couch surfing while in Europe this summer. Great product!

I've only used this on one backpacking trip, so I'm not yet an expert on it. What I do know: I like the material. It washes well. It does seem to add warmth (though how much, I'm not sure). I took it mainly because I was backpacking R2R at the Grand Canyon, and the North Rim forecast kept wavering between 25 and 32. I sleep cold and was a bit nervous about sub-freezing temps, even in my good down sleeping bag. At Cottonwood campground, it was far too warm to need this in conjunction with my bag, but a little too cool to comfortably use alone. Because I didn't need it, I used it as a mattress cover for my cheap plastic air mattress...and boy was that nice (unnecessarily luxurious, but since I'd carried it, I took advantage). At the North Rim, where I thought I'd need it, the temps weren't as cold as predicted, so I didn't need it there either. I tried at first, inside my down bag, just as an experiment, and got too hot. When I got out of it and took off one layer, I was just right. So...I think it does add warmth.I might not use it much backpacking because of its extra weight (though it's pretty light for what it is). However, I'm definitely going to take it hosteling to use as a sleep sheet. Plus, if I want to go camping while traveling without my good gear, this might be enough--in conjunction with a cheap sleeping bag I buy on the move--to keep me warm enough on a nice night.It IS a little awkward getting in and out of.

Very soft and comfortable, easy to wash and dry, even while camping. Nice versatile bag liner.

I used this on a jungle hike and it's perfect. Not too hot, nor too cold.

My grandson said it works in sleeping bag. Easier to wash than having to wash the whole bag

Inflates easily. I don’t know about overall comfort … it appears to be okay for back sleepers but for side sleepers the jury is out. I believe that the evaluation is really personal preference and not an evaluation of the product. It is compact and relatively lightweight and I’ll leave it at that.

Great idea for traveling but it would be better if it opened on the side with velcro snaps. As it is just like a giant pillow case cover you need to climb into.

I bought 4 others to compare and the weight and size compared to the others made the decision easy. This is small and compact compared to the cheaper ones purchased. The material is soft against the skin and the opening with the v notch (see photo)does make a difference. I don’t feel restricted when I’m using this. I compared with another item of the same brand with zipper and the width was smaller and I didn’t like it as much cuz the zipper comes down when you move around. I did want to like it for giving my few some air when wanted but at the end it wasn’t worth it for the zipper inconvenience.