Inov-8 Fastlift 335 - Men's This shoe is designed to offer support, structure, and stability for those heavy, weight-training days. Rip-stop nylon upper with synthetic overlays. Midfoot strap provides added stability and a more secure fit. 3mm molded footbed improves fit and provides comfort Meta-Flex groove in the forefoot of the outsole provides a natural flex point. Power-Truss heel provides support without additional weight. External Heel Cage (EHC) keeps the heel snug while remaining lightweight. Wt. 12.7 oz.