The ultimate for cold cragging days or for climbers who suffer from cold hands

The ultimate for cold cragging days or for climbers who suffer from cold hands
Building on the responsive freeride performance of our best-selling Boundary skis, our Boundary Pro Series features powerful, hard-charging models designed with the help of our pro athlete team.


Sure, we’ve all been there.

You’re lured in by sending temps then BAM! You’re hanging on the end of the rope due to a case of numb fingers. Well, at Black Diamond, we set out to once and for all crush the problem of numb fingers, and now we’re proud to introduce the Hot Forge Heated Chalk Bag.

Built for climbers who suffer from cold hands, or those who are in constant pursuit of high friction but still battle with numb tips, the Hot Forge Heated Chalk Bag combines our innovative 3-level heating system utilized in our ground-breaking Solano gloves, with the technology of our Hot Forge insulating jacket, to give you the ultimate sending machine.

To Steck’s surprise, those initial prototypes failed under a load of less than 5kN.

“There was clearly something going on that was different for a cam this size,” says Steck. “Turns out it was understanding and managing the buckling of the cam lobes.”

Solving for the buckling issue took a while to figure out, according to Steck. The obvious solution of just making the lobes thicker wasn’t totally viable, since cams this size would quickly reach a weight too heavy for a climber to carry. 

“I had to go back to the basics and nerd out on stuff like Eigenvalue Buckling for a bit,” says Steck. “After many hours of FEA simulations, several rounds of prototypes, countless laboratory tests, many scary hours of field testing followed by iteration after iteration, we arrived at a design we’re proud to include in our tried and true Camalot C4 line.”

Featuring our innovative trigger keeper, which keeps these big guys retracted for compact racking and immediately releases when they’re deployed, the #7 and #8 Camalot C4’s are ready to be placed in those previously unprotectible fissures of fear.

“I’m sure every trad climber out there has found themselves in a spot, a least once in their climbing career, where they were shitting their pants and wishing that they had something like this,” adds Steck. 

So, regardless of whether you’re a bonafide wide crack masochist, or just a climber looking for adventure … finally, your rack is complete.

By combining 80 gram insulation with our Hot Forge design, we landed on a bag that not only houses the heating element, but also traps heat effectively. What we created is a revolutionary heated chalk bag with three different temperature settings depending on the level of numbing out you typically experience given the ambient climbing conditions.

"With the help of BD and their team of top-notch engineers and designers, I now have the ultimate secret weapon for sending."




300 g Loose White Gold Chalk

1 / 2
Pure, uncut and ready to rock. Learn More
Item# BD5504950000ALL1
(VAT included, shipping costs excluded)


Free Shipping On Orders Over 100 €
Delivery within 10 business days

Product Actions

Add to cart options
Hot Forged Heated Chalk Bag Slot 7


•    Innovative trigger keeper for compact racking
•    Sling is updated visually for easier differentiation when racking
•    Double-axle design offers the widest range ever invented
•    C-Loop continuous cable stem design is strong and durable
•    Color-coded for easy identification
•    LiteWire Rackpack available for easy racking (see Carabiners)

video + bullets close