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 QForm® stride-centering.

UPPER/LINING
• Strobel construction offers flexibility and comfort
• Synthetic leather and mesh upper
• Bellows tongue keeps debris out
• GORE-TEX® Extended Comfort Footwear lining keeps feet dry and comfortable
• Lining treated with Aegis® Antimicrobial solution maintains foot comfort
• Ortholite® Anatomical Footbed

MIDSOLE/OUTSOLE
• Molded nylon arch shank
• QForm® Comfort midsole provides women’s specific stride-sequenced cushioning
• Merrell Air Cushion in the heel absorbs shock and adds stability
• 5 mm Sole lug depth
• Vibram® Siren Song Sole/TC5+ Rubber

UK Women’s Sizes: 4-8 full sizes only
EUROPE Women’s Sizes: 36-42
Weight: 11.5oz (326g)