We've organized the most commonly used items people use to address the Core function below, with example images, characteristics, features, etc.
Name |
Sheet |
Sleeping bag liner* |
Single sheet, thinner than a blanket |
Think of a sheet folded in half & stitched together, may also have a hood |
Example images |
|
|
Effect on secondary factors |
Price
|
$10-50 |
$10-60 |
Warmth
Given shape-only
|
No comparable temperature rating
Not enclosed, so doesn't keep out drafts & may create excessive dead air
|
Adds up to 8F (4.4C)
Enclosed & may be form-fit to minimize drafts & excessive dead air
|
Capacity |
Twin to king size |
Individual sized |
Weight |
Not optimized for weight |
Up to 16oz (454g) |
Why we do/don't carry it
= we rent = we sell
|
Not specific enough for outdoor use |
Standard for most outdoor uses
|
*Sleeping bag liners also come in rectangular or mummy shape. Since this shape impacts secondary factors similarly as we've already discussed for sleeping bags, and the shape is less of a big deal since the liner is more of an accessory item, we have not separated liners into shapes here.
With any of the form factors above, a difference of material is also significantly important. That said the data on the materials below is only for sleeping bag liners, not sheets (since they are not optimized for the technical factors we'll consider below, e.g., warmth or weight & size).
Sleeping bag liner material |
Silk |
Synthetic (e.g., microfiber) |
Cotton |
Effect on secondary factors |
Price |
$40-60 |
$20-40 |
$10-30 |
Warmth* |
Up to 8F
(4.4C)
|
Up to 6F
(3.3C)
|
Up to 4F
(2.2C)
|
Weight & Size |
Up to 6oz
(170g)
|
Up to 10oz
(283g)
|
Up to 16oz
(454g)
|
Why we do/don't carry it
= we rent = we sell
|
Much more expensive relative to the improvements in weight savings or warmth |
Versatile for most outdoor uses, therefore more worth the money
|
For rent for sleepers who need extra capacity; extremely limited availability, please call to reserve
|
We only offer liners for rent since most people would just buy a sleeping bag (whereas with rentals, even though bags are sanitized between uses, some people want a hygiene barrier) |
*Warmth added when paired with a sleeping bag. Whether the max is attained really depends on individuals, your body heat generation, other layers, etc.