Quick Summary
The Merrell Siren 4 Thermo Mid Zip WP Women’s Boots are a mid-height women’s boot in Tobacco, size UK 6.5. They are described as waterproof and include a side zip for easier on and off.
The key product points here are the waterproof upper, the waterproof membrane, the insulating lining and the ice-focused outsole. If you are choosing between offers, make sure the size and colour match what you want.
Key Details
| Detail | Verified information and buyer relevance |
|---|---|
| Product type | Women’s mid boot, useful if you want a higher boot profile. |
| Colour | Tobacco. |
| Size | UK 6.5. |
| Water protection | Waterproof upper with a waterproof membrane. |
| Fastening | Medial zip for easier on and off. |
| Upper | Full grain leather and knit upper. |
| Lining and insulation | 100% recycled fleece lining, 200 grams Primaloft Gold Eco Series synthetic insulation and SOLARCORE Aerogel insole. |
| Midsole | FloatPro Foam midsole. |
| Outsole | Vibram Icetrek outsole with traction lugs. |
What to Compare Before Buying
- Size: This pair is UK 6.5, so compare it with the size you need.
- Colour: The stated colour is Tobacco, which matters if you want a specific finish.
- Waterproofing: The boot is described as waterproof with a waterproof membrane, so check that this is the level of protection you want.
- Closure: The medial zip is part of the design, so compare it with the fastening style you prefer.
- Outsole: The Vibram Icetrek outsole and traction lugs are part of the stated design, so consider whether that outsole style matches your intended conditions.
When to Consider a Different Option
A different size should be considered if UK 6.5 is not your fit. You may also want another option if you do not want a mid-height boot, a zipped boot or a waterproof winter-style design.
Before You Decide
Confirm the size is UK 6.5 and that Tobacco is the colour you want. Check that the mid-height, waterproof design and zip fastening match your needs before choosing an offer.








