M 361 Spire 4

Description

Features 

• Upper features a breathable knitted upper with a roomier vamp promoting more ventilation and natural foot movement.
• MORPHIT construction in the mid-foot and heel to provide a comfortable, secure and supportive environment.
• Pressure Free Tongue is designed to provide comfort and avoid irritation during flexion.
• Ortholite insoles utilize 20% recycled content while still retaining the performance fit and comfort that runners want.
• The QU!K Spine is a carbon fiberglass shank that adds linear integrity to the mid-foot.
• QU!K Flex 4Foot Engineering provides for a natural and balanced toe-off and enhances ground contact for better acceleration.
• QU!K Spring+, an EVA foam designed to provide more rebound and comfort in a lightweight package.
• QU!KFOAM, a midsole material comprised of an EVA rubber blend with PU coating that provides excellent durability, cushioning and responsiveness.

Specifications