"zip it together with your schmoopy's" - very funny. This is a left-zip only bag. Can two bags be zipped together? Maybe by using one of them bottom-up, but are they designed to be used that way (i.e. are they symmetric with regards to a horizontal plane)? The manufacturer's page (http://marmot.com/spring_2008/equipment/sleeping_bags/synthetic/trestles_40_full_rec_reg/details) is even less useful.There's a "2008 update" version of this bag at http://www.backcountryedge.com/marmot-trestles-40-08.aspx, and that comes in left-zip and right-zip configurations, which leads me to believe that the version featured on this page is not likely to mate with another one of its kinds unless you turn one over, which apparently is not recommended.

Tech Specs:

Material:

[shell] Ionic P-220 DWR; [lining] forge P-220 DWR 

Insulation:

SpiraFil 120 

Shape:

rectangle 

Draft Collar:

yes 

Max User Height:

6 ft 

Shoulder Circumference:

62 in 

Hip Circumference:

60 in 

Foot Circumference:

60 in 

Stuff Sack:

yes 

Storage Sack:

yes 

Weight:

2 lb 3 oz 

Recommended Use:

summer camping, car camping, couch surfing 

Manufacturer Warranty:

1 year