The invention relates to novel benzotriazole UV-absorbers having a long wavelength shifted absorption spectrum with significant absorbance up to 410-420 nm. The article of footwear in the form of a snowboard boot is provided with stiffness elements that are inserted within retaining enclosures disposed on either side of an inner liner of the snowboard boot. The system also includes a rectifier controller configured to receive a current sense signal indicative of the rectified output current and to generate the control signals based at least in part on the current sense signal, where the control signals cause the current source rectifier to attenuate at least one of a plurality of harmonic frequencies in the rectified output current. The second welding part has a vertical rectangular shape in cross-section, and the fourth welding part has a concave groove formed in which the second welding part is inserted. A second pixel of the pixel array is driven with a second pulse having a duration determined on the basis of the value loaded into the counter and a value stored in a register. The frame assemblies have rigid frame members and distensible bags mounted on the frames.