Can this bag be joined together?

Tech Specs:

Material:

[Shell and Lining] 100% tafetta nylon 

Insulation:

Climashield HL 

Shape:

Rectangular 

Draft Collar:

Yes 

Max User Height:

[Regular] 6ft 4in (192cm); [Long] 6ft 8in (203cm) 

Shoulder / Hip / Foot Circumference:

[Regular] 70/ 66 / 64in ( 177 / 167 / 162cm); [Long] 72 / 66 / 64in (183 / 167 / 162cm) 

Stuff Size:

9.5 x 18in (24 x 46cm) 

Stuff or Storage Sack:

Both 

Degree:

20F (-7C) 

Weight:

[Regular] 3lb 12oz (1702g); [Long] 3lb 15oz (1800g) 

Recommended Use:

Car camping 

Manufacturer Warranty:

Lifetime