What is the R value of this pad?

Tech Specs:

Material:

PU coated nylon 

Dimensions:

[Reg] 20 x 72 x 2.5in (51 x 183 x 6cm); [Long] 20 x 78 x 2.5 (51 x 198 x 6cm) 

Rolled Size:

[Reg] 4 x 8in (10 x 20cm); [Long] 4.5 x 8in (11.5 x 20cm) 

Weight:

[Reg] 23oz (652g); [Long] 25oz (709g) 

Recommended Use:

Summer camping 

Manufacturer Warranty:

Lifetime 

Country of Origin:

United States