How should I inflate my self-inflating mat the first time?
For the first time use, the mat will require a few breaths during the first inflation as it has been compressed throughout the transit process and prolonged storage, but will then self inflating in normal temperatures.

How should I store my sleeping mat?
Self-inflating mats are best stored unrolled with un open valve when not being used. This is so they can become accustomed to this shape. Clean only with a damp cloth or sponge.

Is 3D shaped SELF-INFLATING SLEEPING MAT?
Insulated well enough for three-season temperatures?  Absolutely. The 3D shaped Self-Inflating Mat has a tested R-Value of 10.7– suitable for even really cold outside temperatures.

Easy to pack up? 
Relatively easy. The flip-over valve prevents the mat from drawing air back in while it is being rolled up – but a mat of this size – especially the Double - still requires some effort to pack into its stuff sack.

Small enough when packed to use for non-motorized travel? 
No. The packed volume is similar to a folding camp chair, so the 3D shaped Self-Inflating Mat is really not suitable for human-powered travel.

Cautions?

Keep away from the fire and other possible sources of heat.
Avoid prolonged sun exposure.
Avoid using pumps.

参考链接;

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https://www.thermarest.com/ie/faq?cat=faq&folderId=tar-sleeping-pads