
Arc'teryx has just dropped the latest in its line of Alpha climbing backpacks, and if you're a climber or mountaineer, you're going to want to sit up and take notice.
The Arc'teryx Alpha SL backpack is a 30L pack intended for rock, ice, and alpine climbing, and the big story is its astonishing strength-to-weight ratio. The Alpha SL is made using a material called Graflyte fabric, developed by Aluula Composites in Canada, that claims to be eight times stronger than steel for its weight and 100% recycle-ready.