Prism 40



All-around alpine pack for skiing, climbing, and mountaineering

Charge headlong into winter’s white light with the pack built for alpine adventure. The Hyperlite Mountain Gear Prism 40 beckons ice climbers, mountaineers, alpinists, and backcountry skiers to think big and go deep. Designed to meet at the intersection of speed, weight, security, and comfort, this top-loading pack features an extendable drawstring closure and an adjustable, removable low-profile lid. The hip belt provides two gear racks and two ice clipper slots, but is removable when not required for the task at hand, or when wearing a climbing harness. Highly adjustable compression straps secure crucial equipment while keeping the pack close to the body for free and unrestricted movement.

Climbers can store a rope under the lid, glacier adventurers can store their wands in the side pockets, and backcountry skiers can depend on the A-frame carry when they’re on foot marching up the steep stuff. Alpinists of all types can round out the pack with the Prism Crampon Bag and Prism Ice Screw Case for an even more dialed setup (each sold separately). However you move when the cold comes calling, the Prism brings your pursuits into focus.


Brand Name:
Hyperlite Mountain Gear
Cubic Inches:
Internal: 2400
Removable Lid: 214
Internal: 40
Removable Lid: 3.5
Weight Capacity:
up to 50 lbs
1.82 lbs | 29.1 oz | 827 g
Weight does not include hip belt and may vary slightly by torso size
Top Circumference: 38 in. | 96.5 cm
Bottom Circumference: 28 in. | 71.1 cm
Height (fully extended): 35 in. | 88.9 cm
Back Width: 11 in. | 27.9 cm
Other Features:
-- Main pack body is built with Dyneema® Composite Fabrics DCH150
-- Side panels, bottom, and lumbar are 375-Denier DCHW for the ultimate abrasion protection from the environment, ski edges, and sharp tools
-- Removable, Hardline with Dyneema® hip belt with 1/8in. closed cell rigid foam and 1/4in. closed cell foam padding and spacer mesh features (2) gear loops, (2) ice clipper slots, and an offset buckle to reduce tie-in clutter
-- Extendable collar and floating lid allow for pack expansion
-- Diamond pocket locks tool heads in place without additional buckles
-- Reflective bungees with quick-release pull tabs secure axe handles
-- External crampon pouch with easy-cinch closure keep crampons secure and within reach during the approach
-- Multi-purpose compression straps allow you to draw in your pack or attach additional items like snowboards and sleeping pads
-- Top overload strap secures gear stored under the lid and brings the load closer to your center of gravity
-- Exterior daisy chains provide multiple lashing points for other gear
-- Axe loop for non-technical mountaineering axes
-- Low profile side sleeve pockets with drainage holes hold mountaineering wands/pickets, or trekking/tent pole tips
-- Hardline with Dyneema® shoulder strap construction with 3/8in. closed cell foam and spacer mesh
-- Adjustable sternum strap with self-tensioning elastic and whistle
-- One removable, contoured aluminum stay, and an integrated 1/4" foam back panel pad and plastic stiffener provide shoulder and spine support for a comfortable and secure carry
-- Proprietary seam sealing on all side seams and behind all sewn-on pack features
-- Bar tacked reinforcements on all stress points provide enhanced strength and durability

-- Adjustable and removable lid means you can overstuff your pack using the extendable drawstring collar and still have weather protection, or remove it completely to save weight on clear days
-- Waterproof, zippered pocket on the lid provides convenient storage for snacks, gloves, phone, map, or anything you want within easy reach
-- Elastic sides provide a snug fit to keep weather out, while helping secure a rope underneath
-- Lightweight, aluminum G-hooks attach the lid securely to daisy chains in the front and rear and are easy to use with gloves on

-- Body: DCH150 (White) + 375-Denier DCHW
-- Bottom: 375-Denier DCHW
-- Crampon Pouch + Diamond Pocket: 375-Denier DCHW
-- Lid: DCH150 (White) + 210D Nylon (Gray)
-- Extension Collar: 210D Nylon (Gray)

After a number of internal studies, Hyperlite has decided to remove the metal grommets from the weep holes of their packs. This product may ship with or without the grommet as they are phased out from Hyperlite's inventory.
The grommets were not an essential feature to the weep holes of the pack. Hyperlite has determined there is no physical function of these grommets and they have been merely for aesthetic purposes. Their design and production team has developed a consistent method of precision drilling the holes in the fabric. The heat generated from the friction from this process will seal the edges of the weep holes and eliminate the chance of the fabric fraying. This will now make the holes just as strong as when constructed with grommets.