From Merrell, the Women's Siren 4 Waterproof Leather Booties feature: Waterproof coated leather upper Waterproof membrane seals out water and lets moisture escape TPU waterproof shell for additional protection Medial zipper for easy on and off Adjustable lace up front with 100% recycled laces Bellows tongue keeps out debris Recycled PET linings FLOATPRO FOAM™ footbed for enhanced cushioning and energy return 100% recycled mesh footbed cover FloatPro™ foam midsole with exceptional energy return and enduring comfort. Vibram Icetrek outsole designed to provide the improved grip on very cold, icy, or snowy surfaces Imported.