Sleek, curved, and crafted to do their owner’s bidding, both the samurai sword and the new MAMMUT SAMURAI ($139.95, mammut.com) are physical expressions of art forms . . . with serious power. In the case of Mammut’s rock shoe, the blade’s curve (a severe downturn) is bolstered by an elastic-feeling heel and arch construction. The talon-like and precise Samurai yields well under pressure, offering control on terrain from techy vert to roof-tastic. Meanwhile, the notably narrow toe is swathed in Vibram XSV, nabbing edges and (especially) pockets with aplomb. Mixed synthetic and leather uppers are comfortable, even when snugged via the easy-adjust lace system.