BIRKENSTOCK Cork Thong EVA New Style Size 36-45 Flip Flops Thong Sandals A109

Introduction: Why Consider the Birkenstock Cork Thong EVA?

If you're weighing options in the slip-on sandal market, the Birkenstock Cork Thong EVA (model A109) presents a specific compromise between classic Birkenstock support and a lighter, more water-friendly design. Unlike the traditional cork footbed sandals that take weeks to break in, this EVA version offers immediate comfort—but with trade-offs. This review compares the A109 to other Birkenstock thongs and similar sandals, helping you decide if this pair fits your lifestyle.

Design & Materials: EVA vs. Traditional Cork

The most striking difference is the footbed: instead of the layered cork-latex blend, the A109 uses a single-piece EVA (ethylene-vinyl acetate) construction. EVA is a closed-cell foam, making the sandal lightweight, waterproof, and easy to clean. However, it lacks the natural contouring and durability of cork. The surface is smooth rather than textured, which some users find less grippy when wet. The upper is a simple thong strap made from the same EVA material, available in sizes EU 36 to 45. The outsole is also EVA with a subtle tread pattern, offering decent traction on dry surfaces but less on wet or uneven ground. Compared to Birkenstock's classic Arizona or Gizeh (cork), the A109 feels more like a beach flip-flop than a structured sandal.

Comfort & Fit: Immediate vs. Long-Term

The EVA footbed is softer from the first wear, requiring zero break-in. For those who found cork footbeds too hard or needed arch support without the rigid edges, the A109 provides a more forgiving feel. However, the support is less pronounced: the arch and toe bar are present but more subtle. The thong strap is adjustable? Not really—it's fixed, so sizing is critical. If you're between sizes, consider sizing down because EVA can stretch slightly. The sandal is also much lighter than cork versions, which reduces fatigue on long walks but may feel less stable for those used to a heavy, grounded sole. For standing all day, the cork footbed still wins on support; for short errands or pool days, the A109 excels.

Durability & Maintenance: Pros and Cons

EVA is more resistant to water and UV damage than cork, which can crack or become brittle if soaked repeatedly. The A109 can be rinsed off after beach use and won't absorb odors as easily. However, the material can become sticky or discolored over time, especially if exposed to high heat. The outsole wears faster than rubber outsoles on traditional Birkenstocks—expect to replace them after a couple of seasons of regular use. In contrast, cork Birkenstocks can last years with proper care (e.g., sealing cork, replacing soles). If you want a single-sandal solution for both hiking and pool, the A109 is not it; it's best reserved for casual, dry conditions.

Comparison with Other Birkenstock Thongs

Birkenstock's lineup includes the Gizeh (thong sandal with cork footbed, leather or synthetic upper) and the EVA Birko-Flor versions. The A109 sits at the budget-friendly end—lower price point than the Gizeh, but with a less premium feel. The EVA Birko-Flor thongs (like the Gizeh EVA) have a synthetic upper that mimics leather, while the A109's upper is all EVA. That makes the A109 more flexible but less structured. If you prioritize a dressier look, go with the Gizeh; if you want a beach flip-flop with a Birkenstock shape, the A109 works. Compared to non-Birkenstock options like Chaco or Teva, the A109 offers less arch support and adjustability, but a more minimal aesthetic.

Sizing and Fit Notes

Sizes 36 to 45 are available, but note that Birkenstock's EVA runs slightly larger than their cork models. Many users recommend ordering one size down from your usual Birkenstock size. The footbed width is standard (not narrow/wide options), which can be problematic for those with very wide or narrow feet. The thong post is positioned similarly to the Gizeh, but the lack of an adjustable strap means you must rely on the fixed geometry. For narrow feet, the sandal may feel loose; for wide feet, the edges might dig in. If possible, try in-store or buy from a retailer with easy returns.

Final Verdict: Who Should Buy the Birkenstock Cork Thong EVA?

This sandal is ideal for: (1) people who want a Birkenstock-inspired footbed without the break-in period; (2) those who need a waterproof, easy-clean sandal for pool, beach, or shower; (3) budget-conscious consumers looking for a lower-cost Birkenstock. It's less ideal for: (1) those who require maximum arch support for long walks or standing; (2) people with wide feet or unique foot shapes; (3) those who expect the durability of traditional Birkenstocks. Compared to the classic cork thongs, the A109 is a lighter, more casual option—not a replacement. If you already own cork Birkenstocks, this makes a good secondary pair for wet environments. If you're new to Birkenstock, try the cork version first to experience the signature support; the A109 may disappoint if you expect the same orthopedic benefits.

How Does It Stack Up Against Competitors?

At $69.88, the A109 is competitively priced among premium flip-flops. Similar EVA thongs from brands like OluKai (e.g., 'Ohana) offer more arch support and a durable rubber outsole but cost more. Havaianas are cheaper but lack any footbed contouring. Reef's fanback thongs provide soft cushioning but no arch shape. The A109 sits in a niche: it mimics the Birkenstock shape but in a cheap material. If you value the brand name and the specific footbed pattern, it's a decent buy. If you're purely after comfort, try alternatives that specialize in EVA footbeds.

Care Instructions

To extend the life of your A109s: hand wash with mild soap and water, avoid leaving in direct sunlight for long periods (causes fading and brittleness), and don't machine wash or dry. Store away from heat sources. The EVA will eventually compress, so rotate with other shoes if worn daily.

Pros and Cons Summary

Pros: No break-in, lightweight, waterproof, easy to clean, lower price than cork models, classic Birkenstock toe bar and arch shape.

Cons: Less support than cork, fixed strap (no adjustability), shorter lifespan, outsole less grippy wet, sizes run large, limited width options.