It is standard Greylock 4.....here is the info from the JRB site under Specs:
Specs
Length: 56 inches (1.4 m)
Width: 42 inches (1.07 m)
Loft: 4 Inches (10 cm)
Material: 0.9 oz., 20 denier, ripstop nylon
Insulation: 800 fill power goose down
Weight: 22.5 ounces (0.64 kg)
Temperature Rating: 0°-5° F (-18° C)
Whooooo Buddy)))) All Secure in Sector Seven
Bookmarks