Get in touch with the ground underneath your feet with the lightweight and high-performing Vivobarefoot Primus Lite II Bio active shoes. Predecessor: Primus Lite. Plant-based Bio upper utilizes renewable plant-based fibers to reduce the reliance of petrochemicals. No-sew Susterra Propanedial TPU - petroleum free, non-toxic and 100 percent USDA certified; Added mesh from Sorona plant-based fibers. Recycled PET mesh keeps feet cool while remaining lightweight. Lace-up closure. Thin tongue and collar. 3mm performance insole from 10 percent BLOOM - an algae-based alternative to synthetic and petrochemical EVA. Vegan construction produced using animal-free products and processes. Outsole: 45 percent natural rubber, 45 percent synthetic, 10 percent BLOOM. Imported. Measurements: Weight: 7 oz Product measurements were taken using size 38 (US Womens 7.5), width B - Medium. Please note that measurements may vary by size. Weight of footwear is based on a single item, not a pair.