Comfort collaranatomically shaped collar is flexible and breathable yet supportive for excellent comfort and fitmoulded comfort eva socklinerprovides a moulded fit for longlasting comfort and supportdiscproprietary closure system for easy and fast tightening that provides a locked in consistent and comfortable fit and loosens with a simple left turn4 way stretch waterproofperformance mesh stretchy and breathable yet supportive wp mesh that adapts to each unique foot shape for ultimate fitignite