Indosole: Flip Flops - Pollen The quest to make the perfect flip flop has led to the ESSNTLS. Indosole started by sourcing the best materials we could find—natural rubber and vegan uppers. Thoughtful ingredients combined with our signature recycled tire sole technology and an affordable price make the ESSNTLS the most ‘ECOnomical’ flip flop in the world. DETAILS: Recycled tire soles Contoured natural rubber footbed Embedded arch support Waterproof Comfortable nylon toe thong Laser engraved ENVRO fiber straps Light and flexible at approx. 247g (8.7oz) Made without animals or the use of fuel powered machinery