Packs · 4–7 nights

Cirque 55 Pack

Frame-sheet hauler for 4–7 night alpine routes. Ice-tool retention, no zippers to freeze. Built for the window where the forecast is wrong and you're still three passes from the car.

★★★★★ 4.9 · 214 reviews

$285 In stock · ships in 2 days

Repaired for life. Torn, blown, chewed by a marmot — send it in and we fix it free, first owner or fifth.
90-day trail trial. Take it out properly. Doesn't hold up? Full refund, and we want your notes.
Cut and sewn in Bishop. Every pack passes one bench and one person before it ships.

Every number we measured

The spec sheet, unrounded.

Weights are the actual mean of ten production units on our own scale, in the size shown. Nobody's marketing department has touched these.

Cirque 55 · size M
Measured weight	2 lb 14 oz / 1,304 g
Weight, stripped	2 lb 1 oz / 936 g
Volume	55 L + 8 L extension
Recommended load	up to 45 lb / 20 kg
Frame	6061-T6 alloy stay + HDPE framesheet
Main fabric	210D ripstop UHMWPE grid
Base fabric	420D nylon, PU 3× coated
Hipbelt	Dual-density EVA, heat-mouldable
Torso range	16–21 in (three back lengths)
Closure	Roll-top, no zippers
Attachments	2 ice tools, rope strap, crampon patch
Hydration	Internal sleeve, 3 L
Country of make	Bishop, California

Materials & why

Three decisions worth arguing about.

210D UHMWPE grid ripstop
Four times the tear strength of the 420D we used until 2023, at 30 g/m² less. It scuffs and it fuzzes — it does not rip.
Heat-mouldable hipbelt
Twenty minutes in our shop oven and it takes your iliac crest. Bring the pack in or follow the kitchen-oven guide we ship with it.
No zippers on the main body
Every warranty claim we logged between 2016 and 2021 that involved a zipper involved grit. So we removed them.

Back length — measure spine to iliac crest
Size	Torso	Belt range
S	16–17 in	26–34 in
M	18–19 in	30–40 in
L	20–21 in	34–46 in
XL	22 in +	38–52 in

Between two sizes? Take the shorter one — the belt carries the load, not the shoulders. Or ask the bench and we'll work it out with you.

Field-tested

This pack's own test log.

We don't publish a highlight reel. Here is every trip this design went on before it earned a part number — including the two where it lost.

Feb 2026
Bishop Pass traverse, −12 °FSix nights, 41 mph sustained on night four. Framesheet held. One hipbelt buckle iced shut — redesigned, now the shipping part.
Nov 2025
Palisade Traverse, 5 daysCarried 47 lb over the recommended load on purpose. Stay bent 4 mm and stayed bent. We now state 45 lb and mean it.
Aug 2025
Sierra High Route, 19 daysDana Okonkwo's production sample. Base fabric abraded through at the scree-glissade contact point; base changed to 420D that October.