SIREN 4 THERMO CHELSEA WP SIZE:9 Elastic bungee lace offers you

Elastic bungee lace offers you adjustability and support

EVA midsole offers nice arch support and shock absorbency

Birkenstock's anatomical footbed cradles your foot

400 gram 3M™ Thinsulate™ insulation

Rubber sole is lightweight

SIREN 4 THERMO CHELSEA WP SIZE:9 Elastic bungee lace offers youSiren 4 Thermo Chelsea WP is a LADIES casual winter walking boot by Merrell Waterproof leather upper with waterproof, breathable membrane Removable footbed is treated with NXT to prevent odour 100 grams Primaloft Gold Eco Series synthetic insulation Solarcore insulation with Aerogel provides underfoot superior warmth while being extremely flexible and ultra thin Vibram Ice Trek outsole designed to provide improved grip on very cold, icy, or snowy