PU & mesh upper for a lightweight & more breathable shoe. California construction for sock-like | consistent fit. Side support strapping & lacing system for a performance tuned fit that keeps your foot firmly in the base of shoe. Strong pre-moulded insert heel counter for heel protection. Additional support from a welded thermo plastic outside heel counter cage which compliments the moulded inside heel counter insert. Full EVA sponge lasting board for added cushioning. Moulded footbed | anatomically contoured for added comfort. Phaelon midsole | the ultimate cushioning | absorbing most of the shock with every footstrike. Compression molded rubber spike sole | designed for proper flex & grip. Engineered TPU waist rib for midfoot stability & twist control. Full sets of all metal McNeil spikes and durastuds included.