La Sportiva Jackal II Boa

Performance-oriented Mountain Running® shoes for ultra-long distances. Double BOA® twist closure for quick and perfect volume adjustment, even when running. The same sole unit of the Jackal II, shock-absorbing and equipped with Infi nitoo® technology for less energy expenditure. Protective upper with precise, snug fit that provides stability even on the most technical sections of an ultra marathon. Double closure flap in 3-layer microfibre for support and flexibility. Double Boa® Fit System: maximum heel hold and optimal volume regulation at the front + Technical fit to run long distances. + SpiyralFit tongue and collar construction made of multi-layer, highly elastic Ariaprene: protects against impact and dirt penetration and ensures high breathability. + Innovative sole/outsole unit made of dual density EVA - one for cushioning and one for stability. The unit is equipped with Infi nitoo™ technology, two internal shock-absorbing polyurethane pads with high energy return.