Trek men’s black cycling bib shorts size M . Scratch on thigh #cycling #biker the added support of bibs, designed for riders seeking all-day comfort. Our most versatile bib short ever The Circuit Cycling Bib Short is one that everyone should keep in their cycling wardrobe. Circuit is ultra-versatile and is built with lightweight, breathable main materials for an optimal balance of compression and breathability. The form-fitting dual-density Elite inForm Chamois provides comfort for miles with guaranteed smiles.