Like most slippers, it doesn't face climb well. 5mm Fusion S2 rubber, 2mm pressed-fiber midsole, unlined forefoot. Decent all-around performance for long crack routes. Lacks sensitivity and high-end performance. 4mm Fusion S2 rubber, no midsole, unlined.
Soft sole gives excellent grab and sensitivity on very steep rock and plastic.
Poor edging performance reduces this shoe's usefulness to plastic and very specialized sport-climbing and bouldering applications. Single pull-loop on heel makes foot entry very difficult. Stiff sole and trim toe profile makes for good toe-pocket power. 4.2mm Stealth C4 rubber, Fishhook midsole around toe edges, lined. The zipper is difficult to close when the shoe is sized tight, uncomfortable in wide cracks, and doesn't allow for much variance in fit.