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The Mastia is the newest shoe in the Tenaya line, designed for cutting edge performance and control. The most aggressive shoe in the Tenaya line, the Mastia is a split-sole shoe combining down turned precision and sensitivity with edging power.
The Mastia features Tenaya's first ever thermally molded heel cup for maximum precision in heel hook performance. The split sole construction allows for extra flexibility while reducing edge deformation. The advanced technology and construction minimizes pressure on the toes while maximizing transmission of power.
The shoe features a single Velcro strap closure system for quick entry / exit and maximum foot retention, along with a sticky rubber covered toe box for increased protection and grip.
Notes: Vegan
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| Weight | 680 g Single : 340 g / 11.9 oz |
| Closure Type | 1 Velcro closure |
| Gender | Unisex |
| Volume | Low Narrow |
| Sizing Information |
US M 3.5-12.5 US W 4.5-13.5, including half sizes Take your average size for European and/or U.S. based climbing shoe brands. Your Tenaya size should be approximately 0.0 to 0.5 sizes larger than your average size in European brand shoes, or 0.5 to 1 size smaller than your average size in U.S. brand shoes. Downsize the Oasi and Tarifa 0.5 size smaller than this.  Tenaya-Shoe-Size-Chart.jpg |
| Best Use (Highest Performance) |
Sport / Face Over-hanging |
| Asymmetry | Aggressive |
| Tongue Details | not provided by the brand |
| Last Details | Shape: Downturned (performance) Construction: not provided by the brand not provided by the brand |
| Upper Material | not provided by the brand Microfiber |
| Midsole Material | not provided by the brand 2D multi-layer stretch tex |
| Sole Material | 3.5 mm
Vibram XS Grip
Rand: not provided by the brand |
| Footbed Lining | Unlined |
When I first slipped into Mastia, I instantly noticed how asymmetric the shoe was. It felt strange for a moderate shoe to be so asymmetric, but once I started up some techie vertical sport routes, it all started to make sense. Honing in on small edges and features made me feel like a surgeon executing millimeter precision. The toe box feels so precise it confidently sticks to even the smallest of features.
The Mastia is a good all-rounder with a varied focus, ranging from overhanging sport to bouldering on rock types which require that little bit of extra sensitivity. Out of the box the forefoot feels quite stiff, but given a bit of use the shoes soon soften up and enter their prime, which is perfect for smearing, albeit with a bit of support left over for edging. Their synthetic uppers mean that whilst they give a little, they don't give much, so don't buy them too small, and be aware that they are at the wider end of the spectrum. Whilst their price tag is undoubtedly premium, and the build quality is good, they perhaps lack that same level of finesse as the Italian boot brands. Overall though they're shoes that we like and will continue to keep wearing after this review has been written.
The Mastia is an interesting shoe, more high-volume than Tenaya’s other offerings, with a rounded—almost blunted—toe that’s been sculpted for edging. It’s also a soft shoe, which means that lighter climbers will likely feel greater control and support—one tester, a petite woman, raved, “The Mastia was excellent on overhung limestone—you can’t get much more precise than that,” after using it on the smooth dolomite of Wild Iris and appreciating how fluently the shoe stood on micro-spikes and flossed into pockets. On the other hand was our muscular male tester, who noted rolling on edges, though he had sized his shoes large. The Mastia also scored high marks for its sensitive heel and big toe-scumming patch, as well as for smearing—the same flex that can make edging strenuous also means sticky, glommy smear-work. As a performance all-arounder, the Mastia strikes a solid balance between comfort and power, making it a great choice for difficult multi-pitch, bouldering, and long, varied sport pitches.
