A Siren that sounds the alarm when the weather comes up bad, and keeps pace with the worst it can throw out. Mesh upper backed by GORE-TEX® membrane has the highest level of breathability while being completely waterproof without any unwanted bulk-up. Narrow gauge webbing and synthetic leather strapping provide support while anchoring speed lacing. Underneath it’s all about cushioning and alignment, with proprietary Merrell Air Cushion matched to Q-Form® stride-centering.

Upper/Lining

• Synthetic leather and mesh upper
• Bellows tongue keeps debris out
• GORE-TEX® extended comfort footwear lining keeps feet dry and comfortable
• M-Select FRESH naturally prevents odour before it starts for fresh smelling feet

Midsole/Outsole

• Moulded nylon arch shank
• Merrell air cushion in the heel absorbs shock and adds stability
• Merrell QForm® Comfort midsole provides women’s specific stride-sequenced cushioning
• 5 mm sole lug depth
• Vibram® outsole