A great variety pack of Micro Fit and Lightweight Heel Fit. 1 pair Micro Fit: The thinnest and lightest ski sock to achieve the closest possible boot fit. Ideal for custom molded boots or when no-bulk fit is desired. Ultra lightweight. Super thin toe seam. Excellent base layer for moisture management. 1 pair Lightweight Heel Fit: A performance fit with cushioning for shin protection and improved heel fit. Mapped heel and ankle cushioning improves heel fit. Shin pad shape improves boot tongue comfort. Machine wash warm.