XERO SHOES ZELEN is an eco-friendly Zero Drop running shoe that’s made from recycled and biodegradable materials. Offering supreme comfort and sustainability so you can hit the road or hit the town! Featuring a a breathable knit upper made with rPET recycled material and a silky-smooth, biodegradable sock liner that’s sure keep you cool and comfortable. Only weighing 7.8 oz per shoe, these flexible shoes offer excellent ground feel with a 5 mm sole. An excellent every-day shoe!