← All gear comparisons

Gossamer Gear Gorilla 40 vs Outdoor Vitals CS40 Ultra

Weight and specs compared for 2026 — and which one to choose.

No winner on weight yet. The recorded weights have not both been verified on the same basis. Size, included parts and single-item versus pair weights can differ. Check the linked sources before choosing a replacement.

Swipe to see all details.

Spec Gossamer Gear Gorilla 40 Outdoor Vitals CS40 Ultra
Weight 651 g · 0.651 kg · 1.44 lb 765 g · 0.765 kg · 1.69 lb
Brand Gossamer Gear Outdoor Vitals
Category Backpack Backpack
Gossamer Gear Gorilla 40
651 g

Lightweight 40L weekend pack with internal frame.

See it in your base weight → Full details →
Outdoor Vitals CS40 Ultra
765 g

Ultralight 40L backpack built for ultralight hiking and thru-hiking. Features innovative weight-saving construction that carries 20x its weight.

See it in your base weight → Full details →

Building a pack? Add either one to your HikeLoad list, or drop its weight into the base weight calculator, and see what it does to your total weight.

HikeLoad is reader-supported. As an Amazon Associate we earn from qualifying purchases, at no extra cost to you. Learn more.

Gossamer Gear Gorilla 40 vs Outdoor Vitals CS40 Ultra: which should you buy?

The listed weights alone are not enough to choose between these products. Confirm the size, included parts and weight basis against each source; choose equipment for the function and fit you need.

See where both rank against everything else in this category on the lightest backpack page, or browse the full gear weight database.

More backpack comparisons

Gossamer Gear Gorilla 40 vs Gossamer Gear Mirage 40L Pack ALUULA Gossamer Gear Gorilla 40 vs Gossamer Gear Mirage 40 Gossamer Gear Gorilla 40 vs Gossamer Gear Kumo 36 Superlight Gossamer Gear Gorilla 40 vs Liteway Biggie Pack Ultra 45L Gossamer Gear Gorilla 40 vs Liteway Biggie Pack 45L Gossamer Gear Gorilla 40 vs Patagonia Ascensionist 35L