Women's Sun Kosi

MSRP: $95
Available sizes:
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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.

Technical Specifications


Standard - Women’s standard width is B in the heel and C 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


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

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