IndestructawoolTM technology is a new, patent-pending sock construction. Smartwool uses mega mountain athletes for product testing. And they have put these socks through the paces—literally thousands and thousands of sweaty, tough paces.
PhD socks stand up to miles of adventuring through Indestructawool’s improved durability in high-wear zones, like the heel, toe box, and balls of the feet by 33 percent over the brand’s previous construction.
Intensely tough but still soft to the touch, Indestructawool is a blend of elastic, nylon, and merino wool yarn.
From mountaineering to ultra running to hiking to dance fighting, every men's and women's PhD sock is made using Indestructawool.
A vast majority of Smartwool’s materials are ZQ-Certified.
ZQ certification, which is more than a decade old, requires farms to adhere to strict guidelines in fiber quality, animal husbandry, worker rights, environmental land practices, and overall farm management practices.
Now more than ever, consumers hyper-focus on where their products come from. ZQ wool guarantees the breathability, moisture control, and odor resistance of merino.
But it’s all sourced from happy and healthy sheep. Because nobody wants to use wool from a pissed off sheep with a cough.