adidas Impact Sackpack (Tech Grey/Bright Gold) The Impact Sackpack is feature packed with two zippered front compartments constructed with thick air mesh, one of which is lined with soft tricot fabric to protect your things. The drawstring closure is built with quality thick cording. This sackpack is roomy and has a bottom panel made from durable TPE. The diagonal 3-Stripe design is screen-printed while the adidas brandmark is embroidered.