According to Smartwool apparel standards

Liner: Junior team

Waterproof Porelle® membrane keeps feet dry

Soft elastic waistband

Feetures E20 Elite Light Cushion Quarter Socks Suncloud According to Smartwool apparel standardsOur most technically advanced sock. Designed around our patented Targeted Compression for superior comfort and support plus Ultra Light cushioning that takes up minimal room inside the shoe. Product Details: Patented Sock Lock Technology to provide targeted compression where it's needed most. Anatomical design enhances fit, delivering maximum comfort and protection by eliminating blisters Ultra thin construction takes up minimal room inside the shoe