Sanuk, a division of US footwear group Deckers Brands, has launched the second iteration of its most eco-minded innovation which diverts foam waste and addresses the industry's reliance on virgin foams.

The second collection of the SustainaSole line is comprised of 55% total recycled material by weight and is said to mark a significant milestone for Sanuk's continued pioneering and innovation in creating more sustainable footwear. 

The line, which is vegan, saw Sanuk once again partner with BluMaka to divert foam waste and turn it into quality, comfortable and sustainable shoes, addressing the footwear industry's "heavy, waste-generating reliance" on virgin foams.

Instead of sending foam scrap to the landfill during the manufacturing process, Sanuk and BluMaka were able to collect the scrap, grind it into smaller pieces and use it to create a durable filler for shoe soles. Beyond the foam content, the textile uppers are made with 100% recycled GRS certified fibres, including recycled PET fibres, recycled cotton fibres and recycled polyester fibres.

The shoes also feature undyed uppers, an intentional decision to save both water and energy. The undyed upper is said to save more than 200,000 total gallons of water – 115 gallons per men's Skuner model and 76 gallons per women's Donna model. By skipping the dyeing process on the upper, Sanuk was also able to reduce greenhouse gas impact by nearly three pounds per men's Skuner model and nearly two pounds per women's Donna model.

"Sanuk is committed to seeking new materials and processes to create more sustainable products," says Erik Ecklund, general manager at Sanuk. "These shoes mark a big step forward in our journey – and in the footwear industry – toward sustainable innovation."

Parent company Deckers recently reported a record second-quarter performance, helped by an 83.2% surge in revenue at its Hoka One One brand.