G'day Lorna,

 No - Sea to Summits instructions for washing sleeping mats are as follows:

• lay the mat flat on the floor (or a clean work surface) and close the valve
• wipe the mat down with a sponge using warm water and a mild solution of dishwashing soap. 
  • If you have stains from perspiration or body oils, you should use an enzyme-based cleanser such as Revivex Odor Eliminator
• once the mat is clean, make sure to rinse it thoroughly (if you're able to do this outside, simply hosing down the mat after washing it will rinse it very effectively).

Make sure the mat is completely dry and the XPEL or XPRESS valve is open before you put the mat away for long-term storage (a damp mat may grow mold on its outer surface).

G'day John,

The noise of this style S2S mat seems to depend entirely on the thickness of the mat, and also the sort of sleeping bag you're using it with.  We get some hikers who have a lot of trouble, and some hikers who have no issues at all.
The only thing we've come up with is to grab a tapered liner to slip your mat into, and pull the drawstring tight to keep it all together & fitting firm.  Sea to Summit did used to do a fitted sheet for these mats, but i'm not sure why they've been discontinued.  
Having an additional layer of fabric over the mat seems to do the trick - give it a try and see what you think!

G'day Phuong,

When you select the size from the drop-down menu on the product page the size will update in the product & details section. The X-Small is 128L x 55W cm, the Small is 168L x 55W cm.

G'day Gabrielle,

The Sea to Summit Ultralight Sleeping Mat & Pump is not insulated, but we do carry the Ultralight Insulated model that you can find here as you would want some insulation for the overland!

G'day Owen,

Currently, we've only received the Regular and Large sizes from Sea to Summit with the pumpsack included. 

G'day Mac,

The dimensions of the small Sea to Summit Ultralight Sleeping Mat are 168cm long x 55cm wide. When its packed up its dimensions are 17cm x 7cm x 7cm. 

G'day Travin,

The large Sea to Summit Ultralight Sleeping Mat doesn't come with the pump sack, no. 

G'day Alice, 

The small size is 168cm long and 55cm wide with a rolled diameter of 7cm x17cm whereas the regular is 183cm long and 55cm wide rolled to 7.5 diameter x 17cm.  

Depending on your height, the extra 50grams of the regular will ensure you don't have cold feet!