Merrell W Siren 4 Thermo Lace WP

Waterproof winter shoes with PrimaLoft isolation and a grippy Vibram sole for cold, wet, and slippery winter days.

The W Siren 4 Thermo Lace WP by Merrell is a waterproof winter shoe for anyone who wants to stay comfortable even on cold, wet, and slippery days. It combines weather protection, warmth, and a sporty look suitable for everyday wear—perfect for winter leisure activities as well as daily life when snow, slush, and cold await outside.

The pig suede upper is complemented by a waterproof TPU shell, which provides additional protection against mud and moisture in the lower section. Warmth is provided by PrimaLoft Gold Eco insulation combined with a cozy faux fur lining that keeps you warm even in freezing temperatures.

Special attention was paid to walking comfort: The midsole provides excellent energy return and long-lasting cushioning, while the FloatPro footbed ensures a soft, comfortable fit. A zipper on the inside allows for quick on-and-off, and the Vibram Icetrek outsole provides traction on cold, icy, and snowy surfaces.

This makes the W Siren 4 Thermo Lace WP a reliable winter shoe for cold and wet days.