Merrell Siren 4 Thermo Mid Zip WP - Womens Tobacco 08.0. Now equipped with SOLARCORE insulation lightweight insulation material initially designed for NASA you never have to worry about warmth. The all-new medial zipper provides easy on/off a new improvement made directly from customer feedback. Merrell waterproofing on the upper will keep your feet dry. With Vibram IceTrek underfoot traction remains consistent under the wettest most slippery conditions. For the first time ever incorporating Vibram traction lug for enhanced grip on uneven terrain. Specifications for Merrell Siren 4 Thermo Mid Zip WP - Womens: Manufacturer: Merrell Gender: Female Age Group: Adults Footwear Upper Fabric/Material: Leather Insole Material: Primaloft Gold Eco Midsole Material: FloatPro Foam Lining: Fleece Lining Material: Fleece Package Contents: Merrell Siren 4 Thermo Mid Zip WP - Womens Merrell J037410-07.5: Siren 4 Thermo Mid Zip WP - Womens Black 07.5 Merrell J037410-08.0: Siren 4 Thermo Mid Zip WP - Womens Black 08.0 Merrell J037410-09.0: Siren 4 Thermo Mid Zip WP - Womens Black 09.0 Merrell J037410-07.0: Siren 4 Thermo Mid Zip WP - Womens Black 07.0 Merrell J037412-07.0: Siren 4 Thermo Mid Zip WP - Womens Tobacco 07.0 Merrell J037412-09.0: Siren 4 Thermo Mid Zip WP - Womens Tobacco 09.0 Merrell J037410-08.5: Siren 4 Thermo Mid Zip WP - Womens Black 08.5 Merrell J037412-07.5: Siren 4 Thermo Mid Zip WP - Womens Tobacco 07.5 Merrell J037412-08.0: Siren 4 Thermo Mid Zip WP - Womens Tobacco 08.0 Merrell J037412-08.5: Siren 4 Thermo Mid Zip WP - Womens Tobacco 08.5 Merrell J037412-08.0: Siren 4 Thermo Mid Zip WP - Womens Tobacco 08.0