model 22 | weight: 3.0 lbs. user weight: up to 150 lbs. model 25 | weight: 3.3 lbs. user weight: up to 175 lbs. model 30 | weight: 3.7 lbs. user weight: up to 220 lbs. model 36 | weight: 4.7 lbs. user weight: over 220 lbs. Approximate: * BINDINGS: Z-pattern nylon straps with side buckles for easy adjustments to any size boots. The heel strap is molded from tough, flexible polymer and fitted with a special toggle-activated buckle. A flat, textured foot bed provides a solid foundation * FRAME: Extruded 6000 Series aluminum tube ROUND TAIL for maximum floatation | Powder-coated with a TX35 Deck. * CRAMPONS: Stainless-steel crampon system is powder-coated to prevent build-up of snow and ice * HINGE: Live-Action Hinge lifts the tail of the shoe from the snow with every step ? for added mobility and speed. Made in the USA in La Crosse, Wi