EVA, (Ethylene-vinyl acetate) is some incredibly versatile stuff. It’s the elasticized polymer foam material used in most footwear to add support, structure, and cushioning. It’s incredibly versatile as it can be molded, dyed, cut, and shaped into just about any configuration. It’s incredibly inexpensive compared to the other materials used in footwear such as leather or rubber, and it’s darn easy to get good at working with it!

But it’s not all roses for this wonder material.  EVA doesn’t break-down naturally and so it’s filling landfills across the globe with a product that doesn’t jive with nature. The manufacturing of EVA is a toxic process, and even though EVA scraps and used EVA can be recycled into new EVA – it’s not at all a green process.

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Rao and I are literally scouring the earth seeking eco-friendly and sustainable materials to use in constructing Common Soles footwear.  We’ve come across all sorts of incredible product as well as some down-right scary stuff.  We’re finding materials both here in Massachusetts as well as across the ocean. Building on our Oct 22nd blog post on Making Eco-Friendly Flip-Flops here is an update on some of the materials and construction techniques we hope to be working into our line moving forward. This post is also essentially Part 3 of a series I am writing on sustainable footwear here on our blog. Enjoy!

Rice Rubber Outsole: This stuff is amazing. The outsole is the very bottom of footwear, the part that connects with the ground. Most traditional outsoles are made from rubber or PU (polyurethane). Rice Rubber is a blend of several happier ingredients. It’s a base of natural latex rubber mixed with SBR or Styrene Butadiene Rubber. SBR has been used for over 60 years in all sorts of applications such as tires, shoes, and gaskets. The blend is necessary for durability and longevity (Remember – durable footwear has a longer useful life = fewer pairs need to be manufactured). Rice husks which are a byproduct of the food industry and typically discarded after harvesting are then mixed in with the rubber. The rice husks displace a good portion of the rubber needed as well as add strength to the mixture. Similar to how gravel is added to cement to form concrete. The resulting product is not only a more eco-friendly alternative to traditional rubber soles, but it looks darn cool!

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We’re working hard on designing and manufacturing our footwear to be as sustainable as possible. What is sustainable in footwear though??  Sustainable footwear considers: raw materials, product design, manufacturing processes, end-of-useful-life policy, and a whole slew of other components. So many in fact that the only way a company can truly produce a pair of sustainably made footwear is to tackle one element of the process of achieving total sustainability at a time. We at Common Soles are currently focusing our efforts on materials and manufacturing processes right now.  That is not to say we aren’t doing all we can elsewhere in the sustainability value chain – this is just our area of focus at the moment.

I wrote a bit about materials on October 22nd of this year. This post is on process. The big one we can influence as a band in the US making footwear overseas is how our factory sources materials. Sourcing is a blend of art and science and is a constant battle of quality versus cost. Being who we are (a social venture) we lean toward quality whenever we have a choice. The difficulty we run into often times is that we are quite small in the world of footwear manufacturing and thus often have little say.  Not an excuse though…

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Rao and I have literally scowered India for all and any eco-friendly materials to integrate in our forthcoming styles of flip-flops and footwear.  We met with dozens of vendors selling product that comes from all over India and Asia. The bummer part is they all smiled when we asked for eco-friendly materials and kindly shook there heads.  hmmm...  what to do as we were not going to give up that easily!

It turns out there are quite a few eco-friendly materials that we could easily integrate into our footwear.  They just hadn't been branded that way so nobody knew it, not even the vendors selling the goods.  Here's a sampling of what we found and plan to integrate into our next few styles.

Jute:  Jute is a vegetable fiber that grows all over India. In fact India harvests more than 2 million tons of jute every year which puts them in the lead for tonnage harvested in the world with the next country not even at half that.  Jute is better known as Burlap here in the US, so now you all know what I'm talking about.  Jute is 100% biodegradable and recyclable which makes us happy!  Look for jute in our straps and soles in the future.

Paper: Paper pulp is used to make card-stock. We use card-stock for the hang-tags and hangers for our flip-flops. Apparently almost all the paper pulp processed in India is post-consumer which is something they completely fail to mention!  It may be that post-consumer is perceived as a negative quality wise for the paper producers, but we see it as a positive!

Coconut: You all know the coconut. India harvests more than 9 million tons of it a year putting it at third in the world. The shell of coconuts can be cut and polished to produce a variety of materials which can be used in making a flip-flop. Coconut fiber is also used in several varieties of textile such as the popular Cocona material often used in sportswear.

While we were in India we took samples of the above materials and came up with a few prototypes that used as many eco-friendly materials as possible.  Here are some pictures of that prototype. It has a woven jute sole impregnated with natural rubber for durability and traction, coconut beads and hardware on the strap, and a woven jute insole on the footbed. Let us know what you think!

-Dave

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Meet the Maestri. He is the guru that figures out how to assemble the wacky product ideas we come up with.  Maestri does it with a cool head, steady hand, and incredible patience. It's amazing how he is able to take our garbled direction and actually produce a product that not only looks good, but fits!

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I am enroute to India to meet up with Rao who has been hard at work over there on new product and initiaitves for Common Soles.  As a result we won't be posting any new blog entries until we return the week of Oct 11th. (I know, you'll miss us...)

The purpose of the trip is to get the next few styles and initiaitves dialed in. A women's flip-flop similar to the picture here, and a men's flop!  Each flop will be sold to generate funding to support an initiaitve relevant to the workers that made the flops. Most likely these initiatives will be education related.  The plan is to have these new styles available later this fall!  Wish us luck and please bear with us these next two weeks as Lisa is running the show here in the US by herself until Oct 11th.

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We have our first batch of products shipped from India. We choose to airfreight them albeit it is much more expensive to do this way to save time. Needless to say we are very excited.  Also shipped with our products are silk packaging bags and promotional tags for our initiatives. 

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Check out my amateur attempt at making a video on what goes into making a flip-flop!

-Dave 

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I think these are really neat. These are the cutting dies used to cut the sole material for our flip-flops.  Cool huh?

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