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Guided by our True to the Trail philosophy, the Sun Kosi was made for going everywhere the trail leads, even when it’s not a trail at all. The most versatile in our Freeflow Collection, this performance sandal is built atop industry-leading R-MAT cushioning foam which serves as both outsole and midsole, saving weight while providing incredible durability, traction, and super-soft underfoot support. Adjustable, crisscrossed straps made of quick-drying webbing offer two points of adjustment to secure foot for all-day comfort.

Fit Tip

Length runs true to size.

R-MAT® Molded Footbed
R-MAT® foam technology compound offers superior support and overall comfort engineered after our signature O FIT Insole™.
R-MAT® Midsole
Dual-density R-MAT® technology throughout the midsole provides superior durability, cushioning, support and rebound.
Canyonlands Outsole
A truly technical outsole made with lightweight R-MAT® and blended rubber for durability and extra protection. This combination creates unbeatable grip with long-lasting rebound for an unbeatably smooth ride over even the most rugged terrain.
All features and tech specifications
R-MAT® Cushioning

R-MAT® Cushioning

R-MAT is a blend of rubber, EVA and proprietary ingredients.

REBOUND - R-MAT has outstanding rebound properties providing excellent support and stability on the trail.

TRACTION - R-MAT contours to terrain, latches onto wet obstacles for on/off trail confidence.

DURABILITY - R-MAT is highly resistant to packing out so it will continue to return energy for the long haul.

Adjustable Webbing

Adjustable Webbing

Unique webbing design with two points of adjustment with buckle security.

Technical Specifications

Width

Standard Width - Men’s standard width is C in the heel and D in the forefoot (according to Brannock Device®). Patterns and materials in a given model may influence fit. We always recommend trying our footwear on to ensure the best possible fit.

Upper Material

Low-stretch polyester water resistant webbing with buckle, synthetic suede webbing posts

Weight

M9(1/2PR): 8.6 oz / 244 g

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