Skip to content

Today's Offers

Click offer codes below to apply in checkout. Tap offer codes below to apply in checkout.

There are no promotions running at this time. There are no promotions running at this time.

UP TO 40% OFF SELECT STYLES: Get up to 40% off select styles at Merrell.com, price as marked. Offer valid through 10/19/24 at 11:59 EDT. Purchase quantities may be limited. Not valid on Merrell Prodeal orders, purchases of gift cards or e-cards, prior purchases, purchases at retail stores, or purchases on other websites. Cannot be combined with any other offer, promotion, coupon or discount. Not redeemable for cash or credit unless required by law. Valid on merrell.com U.S. orders only. Void where prohibited by law. Additional restrictions may apply.

No Code Necessary

details

$20 OFF YOUR ORDER OF $100+: $20 off your order at merrell.com when you refer a friend to merrell.com and they make a qualifying purchase. Your friend will receive a $20 promo code to use on their first purchase of $100+ at merrell.com. Please read all terms and conditions. Offer valid on US orders only. Not valid on Prodeal purchases, select full priced styles, prior purchases, gift cards or e-cards, or purchases from retail stores or other websites. Cannot be combined with any other coupon or discount.

No Code Necessary

details

No Code Necessary

Your browser's Javascript functionality is turned off. Please turn it on so that you can experience the full capabilities of this site.

Women's Siren 4 Thermo Demi Waterproof Wide Width

$160.00

Siren 4 Thermo Demi Waterproof Wide Width, Black, dynamic 1

Siren 4 Thermo Demi Waterproof Wide Width, Black, dynamic 2

Siren 4 Thermo Demi Waterproof Wide Width, Black, dynamic 3

Siren 4 Thermo Demi Waterproof Wide Width, Black, dynamic 4

Siren 4 Thermo Demi Waterproof Wide Width, Black, dynamic 5

Siren 4 Thermo Demi Waterproof Wide Width, Black, dynamic 6

Siren 4 Thermo Demi Waterproof Wide Width, Black, dynamic 1

Siren 4 Thermo Demi Waterproof Wide Width, Black, dynamic 2

Siren 4 Thermo Demi Waterproof Wide Width, Black, dynamic 3

Siren 4 Thermo Demi Waterproof Wide Width, Black, dynamic 4

Siren 4 Thermo Demi Waterproof Wide Width, Black, dynamic 5

Siren 4 Thermo Demi Waterproof Wide Width, Black, dynamic 6

Women's Siren 4 Thermo Demi Waterproof Wide Width

$160.00

Select a Type: Wide Width

Medium Width

Medium Width
Wide Width

Wide Width

{"attributes":["size","width"],"inventory":[{"id":"195018031389","quantity":0,"status":"NOT_AVAILABLE"},{"id":"195018031396","quantity":1,"status":"IN_STOCK"},{"id":"195018031402","quantity":0,"status":"NOT_AVAILABLE"},{"id":"195018031419","quantity":5,"status":"IN_STOCK"},{"id":"195018031426","quantity":6,"status":"IN_STOCK"},{"id":"195018031433","quantity":3,"status":"IN_STOCK"},{"id":"195018031440","quantity":13,"status":"IN_STOCK"},{"id":"195018031457","quantity":10,"status":"IN_STOCK"},{"id":"195018031464","quantity":5,"status":"IN_STOCK"},{"id":"195018031471","quantity":3,"status":"IN_STOCK"},{"id":"195018031488","quantity":10,"status":"IN_STOCK"},{"id":"195018031495","quantity":0,"status":"NOT_AVAILABLE"},{"id":"195018031501","quantity":0,"status":"NOT_AVAILABLE"}],"variations":{"195018031389":{"isAvailable":false,"isComingsoon":false,"discontinuedflag":false,"color":"J036750W","size":"5","sizeDisplayValue":"5","width":"W","widthDisplayValue":"W"},"195018031396":{"isAvailable":true,"isComingsoon":false,"discontinuedflag":false,"color":"J036750W","size":"5.5","sizeDisplayValue":"5.5","width":"W","widthDisplayValue":"W"},"195018031402":{"isAvailable":false,"isComingsoon":false,"discontinuedflag":false,"color":"J036750W","size":"6","sizeDisplayValue":"6","width":"W","widthDisplayValue":"W"},"195018031419":{"isAvailable":true,"isComingsoon":false,"discontinuedflag":false,"color":"J036750W","size":"6.5","sizeDisplayValue":"6.5","width":"W","widthDisplayValue":"W"},"195018031426":{"isAvailable":true,"isComingsoon":false,"discontinuedflag":false,"color":"J036750W","size":"7","sizeDisplayValue":"7","width":"W","widthDisplayValue":"W"},"195018031433":{"isAvailable":true,"isComingsoon":false,"discontinuedflag":false,"color":"J036750W","size":"7.5","sizeDisplayValue":"7.5","width":"W","widthDisplayValue":"W"},"195018031440":{"isAvailable":true,"isComingsoon":false,"discontinuedflag":false,"color":"J036750W","size":"8","sizeDisplayValue":"8","width":"W","widthDisplayValue":"W"},"195018031457":{"isAvailable":true,"isComingsoon":false,"discontinuedflag":false,"color":"J036750W","size":"8.5","sizeDisplayValue":"8.5","width":"W","widthDisplayValue":"W"},"195018031464":{"isAvailable":true,"isComingsoon":false,"discontinuedflag":false,"color":"J036750W","size":"9","sizeDisplayValue":"9","width":"W","widthDisplayValue":"W"},"195018031471":{"isAvailable":true,"isComingsoon":false,"discontinuedflag":false,"color":"J036750W","size":"9.5","sizeDisplayValue":"9.5","width":"W","widthDisplayValue":"W"},"195018031488":{"isAvailable":true,"isComingsoon":false,"discontinuedflag":false,"color":"J036750W","size":"10","sizeDisplayValue":"10","width":"W","widthDisplayValue":"W"},"195018031495":{"isAvailable":false,"isComingsoon":false,"discontinuedflag":false,"color":"J036750W","size":"10.5","sizeDisplayValue":"10.5","width":"W","widthDisplayValue":"W"},"195018031501":{"isAvailable":false,"isComingsoon":false,"discontinuedflag":false,"color":"J036750W","size":"11","sizeDisplayValue":"11","width":"W","widthDisplayValue":"W"}},"color":{"attributeID":"color","displayName":"Color","ID":"color","values":[{"ID":"J036750W","displayValue":"Black","value":"J036750W","description":null}]},"size":{"attributeID":"size","displayName":"Size","ID":"size","values":[{"ID":"5","displayValue":"5","value":"5","description":null},{"ID":"5.5","displayValue":"5.5","value":"5.5","description":null},{"ID":"6","displayValue":"6","value":"6","description":null},{"ID":"6.5","displayValue":"6.5","value":"6.5","description":null},{"ID":"7","displayValue":"7","value":"7","description":null},{"ID":"7.5","displayValue":"7.5","value":"7.5","description":null},{"ID":"8","displayValue":"8","value":"8","description":null},{"ID":"8.5","displayValue":"8.5","value":"8.5","description":null},{"ID":"9","displayValue":"9","value":"9","description":null},{"ID":"9.5","displayValue":"9.5","value":"9.5","description":null},{"ID":"10","displayValue":"10","value":"10","description":null},{"ID":"10.5","displayValue":"10.5","value":"10.5","description":null},{"ID":"11","displayValue":"11","value":"11","description":null}]},"width":{"attributeID":"width","displayName":"Width","ID":"width","values":[{"ID":"W","displayValue":"W","value":"W","description":"Wide"}]}}

Size

Size Chart

Size Guide

Women's Footwear Size Chart
US Women's Size	UK	EU	JPN (cm)	US Men's Conversion
5	2.5	35	22	3.5
5.5	3	35.5	22.5	4
6	3.5	36	23	4.5
6.5	4	37	23.5	5
7	4.5	37.5	24	5.5
7.5	5	38	24.5	6
8	5.5	38.5	25	6.5
8.5	6	39	25.5	7
9	6.5	40	26	7.5
9.5	7	40.5	26.5	8
10	7.5	41	27	8.5
10.5	8	42	27.5	9
11	8.5	42.5	28	9.5
11.5	9	43	28.5	10

Use your PayPal Account

Please select Size and Width

With 25 years of Merrell's women's-specific fit, the Siren 4 Thermo is uniquely engineered to cradle the distinct contours of female feet, providing comfort, support, and stability even on the longest hikes with added insulation for warmth and protection.

FEATURES
• Waterproof membrane seals out water and lets moisture escape
• Protective shell keeps feet dry
• Waterproof suede leather upper
• 100% recycled laces and webbing
• Bellows tongue keeps out debris
• 100% recycled fleece lining
• 100 grams Primaloft® Gold Eco Series synthetic insulation
• Rock plate for protection
• FloatPro™ Foam midsole for lightweight comfort that lasts
• Vibram® Icetrek outsole designed to provide the improved grip on very cold, icy, or snowy surfaces
• Drop: 8mm
• Lug: 5mm

See all reviews