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Drop: 0 mm
Stack Height: 15 mm
Color: Red/White

Drop: 0 mm
Stack Height: 26 mm
Color: Gray/Blue

Continuing to feature Altra's Quantic midsole foam, the Altra Superior 4.5 maintains its lightweight design but the improved upper offers enhanced durability, breathability, and drainage.

What's new

• Added durability
• Improved breathability and drainage

The new upper is comprised of a seamless mesh toe-box, with a durable and supportive material in the midfoot and heel. Like the rest of Altra's trails shoes, the Superior 4.5 is equipped with the velcro gaiter attachment.

To protect your feet from stone bruising, this model also includes a removable stone guard. Finally, the sticky rubber on the outsole allows you to fly down your favorite trails with confidence.

MIDSOLE

• Altra Quantic midsole balances cushioning and responsiveness while remaining lightweight. 
• Inner Flex flex grooves system provides additional flexibility and cuts weight for increased performance.
• Natural Ride System (NRS) design includes a more natural, foot-shaped last, zero millimeter heel to toe drop, and metatarsal-specific shapes in the outsole to assist in proper foot mechanics and allow for more natural foot movement. 
• Natural Foot Design follows the natural shape of the foot for ultimate comfort.
• Removable StoneGuard Rock Protection slips underneath the sockliner to disperse shock and protect the feet from rock-bruising. StoneGuard weighs 1.0 oz and is 1 mm thick (Men's size 9).

OUTSOLE

• Trail Claw outsole design uses a sticky rubber multi-directional pattern, combined with updated lugs under the forefoot and claws under the toes to provide improved grip and stability on trails.
• FootPod outsole design follows the natural construction of the human foot for maximum flexibility and a responsive ride.
• MaxTrac Outsole uses anatomically-shaped sticky rubber that prioritizes grip and durability on uneven terrain.

UPPER

• Quick Dry Air Mesh is updated for durability, wicking water away from your foot while remaining light and breathable.
• Seamless Upper reduces irritation and provides next-to-foot comfort.
• Gaiter Trap is a velcro strap that secures trail running gaiters to the shoe, preventing debris from building up beneath the shoe
• Synthetic Overlays provide long-lasting support.

Drop: 0 mm
Stack Height: 26 mm
Color: Wine/Coral

Lighter, Brighter, Faster

Drop: 2 mm
Stack height: 23 mm
Color: Orange/Black

Newton’s Award Winning Distance platform gets an improved upper in 2019 that minimizes strapping to reduce weight and maximize breathability. So fast you will forget how to jog.

• * Weight (oz): 7.6
• * Drop: 2.0mm
• * Support: Neutral
• * Ultra Breathable Mesh
• * New Minimalistic Overlays
• * No-Sew Toe Cap
• * Level and Explosive Technology Package For Maximum Performance
• * Firmer Tuned Technology To Amplify Responsiveness and Decrease Energy Loss
• * Full Foot Newtonium Cushioning System 
• * Dynamic and Energized With Exceptional Rebound

MIDSOLE

• Quantic is a lightweight midsole technology that provides plush comfort with a responsive ride.
• Inner Flex flex grooves system provides additional flexibility and cuts weight for increased performance.
• Foot Shape Toe Box allows the shoe to move with the bones and tendons of the foot.
• Natural Ride System (NRS) design includes a more natural, foot-shaped last, zero millimeter heel to toe drop, and metatarsal-specific shapes in the outsole to assist in proper foot mechanics and allow for more natural foot movement.

OUTSOLE

• FootPod Outsole follows the natural construction of the human foot for a responsive ride, updated to improve flexibility through the gait cycle.

UPPER

• Soft Engineered Knit Upper is updated to provide a soft, secure fit that adapts to the movement of the foot.