Big Agnes Zirkel SL 20°

1 review
5-star:   0
4-star:   0
3-star:   1
2-star:   0
1-star:   0


fall 2010 regular long
Weight 2 lb 6 oz / 1100 g 2 lb 11 oz / 1200 g
Fill weight 15.5 oz / 439 g 1 lb 0.5 oz / 468 g
Temperature rating 20 F / -6.7 C
Fill 800 fill down
Shape mummy
Max user height 5 ft 10 in / 180 cm 6 ft 6 in / 200 cm
Shoulder girth 67.5 in / 171 cm 72.5 in / 184 cm
Hip girth 64 in / 160 cm 69 in / 180 cm
Foot girth 43 in / 110 cm 44 in / 110 cm



Ok, I've only used the bag for two nights. I used…

Rating: rated 3.5 of 5 stars
Design: mummy
Fill: 750 down
Temperature Rating: 20 F
Weight: 2 lbs
Price Paid: $165

Ok, I've only used the bag for two nights. I used the bag in conjunction with the Big Agnes Wedgie bag expander. The Zirkel has a little more room than other mummy bags, but because the pad is attached, it limits movement a bit (e.g. the bag won't move with you if you try to bring your legs up, it's stuck to the pad beneath). That's why I added the Wedgie.

The Wedige did what it was supposed to do--I didn't feel constricted and I could move around comfortably in the bag. But it may have let some cold air in at the top- and I don't know what the temp rating for the expander itself is. Temps dropped to around 25 F and I was a little chilly, despite the bag's 20 degree rating-and I'm not exactly a cold sleeper.

Without the Wedgie, I would have felt constricted (I move around a LOT while sleeping), but I may not have been cold. Hard to tell. Hence, the 3.5 rating. The bag itself appears well constructed, it's relatively lightweight, and the pad, while heavier than the Therm-a-rest I had been using, is much more comfortable.