Ultralight Insulated Sleeping Mat

G'day Toni,

For next time, as you select each size you're interested in (the drop-down box underneath product title), the dimension specifications will change accordingly.

For the Ultralight Insulated Sleeping Mat the dimensions for the small are 168L x 55W cm and the regular is 183L x 55W cm.

G'day Aneeta, 

As your 159cm tall, it looks like the small would be the best length at 168cm long. We are out of stock of this size at this time, so you could very well go for the regular size which is 183cm long which would just give you more wiggle room.

Some hikers do like to go for a size smaller than their height (3/4 length) if they really want to save on space and weight - but the drawback is that your feet can get pretty chilly. 

G'day Alice, 

The external dimensions of the Ultralight Insulated Sleeping Mat in X-Small are 128L x 55W cm and the packed dimensions are 23L x 9W x 9H cm.

Good question Isaac, one for which there isn't a straight forward answer.

R-value is a measure of material to resist the transfer of temperature from one side of a material (in this case a mat) to the other. These values can't be correlated to an exact temperature, and given the testing is done in a lab the results can't be directly transferred to real life scenarios.

As a general rule, for spring/summer camping an R-value of around 3 will be suitable, and for winter camping R-values of 4 and above will be better suited. I'd recommend going for the UL mat with an r-value of 3.3, this way you won't be carrying excess weight on your Aussie adventures.

Then, for colder environments add a basic closed cell foam mat such as this one (although there are cheaper ones around) to your kit and use this underneath your UL mat.

This setup is commonly used my mountaineers as the closed cell mat provides excellent insulation values for its weight and size and add's 1-2 values to the 3.3 R-value of the UL mat, bringing the total R-value up to somewhere between 4 and 5. I hope this helps with your decision.

Hi Julian, Sea to Summit haven't listed a specific weight rating for these mats, but they are manufactured to the highest quality and I honestly don't think you could pop one of them if you tried, unless you take a knife to it! I'll get in touch with Sea to Summit on Monday to see if they do have a weight rating and let you know :) 

G'day Julian, 

I've just been in contact with Sea to Summit, and they've said that the Ultralight Insulated Sleeping Mat doesn't have a weight rating, and as far as they know it would take a significant amount of weight for it to pop - so you shouldn't have that problem unless you laid down on something very sharp. 

G'day Eric,

The Sea to Summit Ultralight Insulated Sleeping Mat is a suitable to use in Australian winters, as it will act as a buffer to stop the transference of temperature. 

If you'd like to have that little bit more cushioning, the Comfort Plus Insulated Sleeping Mat is a good option but it will be slightly heavier and bigger than the Ultralight. 

I think that as long as you choose a mat that is insulated, you should be fine in Australian winter conditions.