Understanding Footwear Materials: What to Look For

Full-Grain Leather

Full-grain leather is the gold standard for durability and longevity. It is crafted from the outer layer of the hide, preserving the natural grain and providing dense, firm fibers that make it the toughest leather available. Initially, it can be stiff and takes longer to break in compared to suede, but it offers superior water resistance. Over time, it darkens and develops a rich patina rather than deteriorating.

There are several variations of leather worth noting:

• Aniline: The highest quality option. It uses flawless hides, stays naturally textured, and takes dye deeply without heavy coatings.
• Pigmented or Top Grain: Keeps the grain but adds an opaque colored finish. It hides imperfections, protects the material, and strikes a great balance between looks and durability.
• Corrected or Pigmented: Pressed with a tinted grain film to cover flaws. It has a slightly artificial look but holds up to heavy wear, which is why it works well for service or steel-toe boots.
• Oiled Leather: Enriched with at least 10 percent of its own weight in oil or grease. It has a soft, matte, waxy finish. It handles wet weather well, scratches rub out easily with a finger or damp cloth, and it actually lightens slightly when stretched.
• Crazy Horse: A brushed full-grain that shows scars and fat wrinkles naturally. It is treated with heavy waxy compounds and shifts color when flexed.
• Calfskin and Box Calf: Fine, tight-grained leather from young cattle. It remains the standard for high-quality dress shoes.

Suede

Suede is created by sanding the inner side of the leather to create a fine nap. This process makes the fibers looser and softer than full-grain leather, enhancing breathability but reducing water resistance. Suede is prone to water damage and stains, and it marks easily. However, it breaks in quickly and feels comfortable right from the start. Its nap reflects light beautifully, adding depth and enhancing its aesthetic appeal. With proper care, well-made suede shoes can last a decade or more.

Depending on the cutting method, suede can vary in form. Additionally, the type of animal skin used affects the texture. Calfskin offers a fine nap, deerskin is supple with a deep nap and natural stretch, lambskin is delicate, and goatskin has a coarser, more robust texture.

• Split Suede: Taken from the lower fibrous layer. It is sanded on both sides and usually used in lined shoes where the lining provides the structure.
• Reverse Suede (Rough-out): Full-grain leather worn with the flesh side out. It keeps the strength of the grain layer and works well in unlined shoes that need to hold their shape on their own.
• Suede Split: Comes from the flesh side of thick leather. It is extremely soft and reflects light beautifully.

Nubuck

Nubuck is full-grain leather that has been buffed or sanded on the outer side to create a velvet finish. Because it retains the grain layer, it generally holds up better than suede. It feels soft, looks dense, and has a tightly woven appearance. However, it requires meticulous maintenance. Waterproofing is essential, and untreated nubuck is considered fragile. It typically ranges in thickness from 1.8mm to 2.2mm.

Knits, Synthetics, and Sole Materials

Modern footwear often uses engineered mesh and knit fabrics, which are light, breathable, and flexible, making them ideal for running and lifestyle shoes. However, they lack the structural integrity and weather protection of leather.

For trail and hiking shoes, technical nylons and Cordura are popular choices. Nylon is light and strong, while Cordura adds abrasion resistance in high-wear areas. Some weaves incorporate Kevlar for added durability against rocks and debris. Canvas and textiles are light, breathable, and washable, suitable for summer casual wear and skate shoes, but they offer minimal support or weather resistance.

Synthetic leathers serve various purposes. PU leather, for instance, is a coated fabric that mimics real leather, offering a light and animal-free option. However, it lacks breathability and does not age naturally, instead cracking rather than developing a patina. Action leather, which is split leather laminated to a flexible film, is durable and waterproof but still classified as leather for duty purposes. Pressed suede is inexpensive and glossy but tends to crack quickly and is not ideal for fine shoes.

Waterproof membranes like Gore-Tex are often laminated inside the shoe upper. These membranes have small pores that block water drops while allowing sweat vapor to escape, providing weather protection but reducing breathability and trapping warmth.

Soles are a compromise between grip and durability. EVA foam is light and shock-absorbing but compresses over time. TPU, a slightly flexible plastic, is used for heel counters and support frames, adding stability without adding weight. Outsole rubber blends are tailored to specific needs: harder rubber lasts longer, while softer rubber offers better grip but wears faster.

Care and Maintenance

Leather hides are processed in drums with water, dyes, and chemicals for ten or more hours. Vegetable tanning is slower and gentler, while chromium tanning is faster and more water-resistant. Once the shoes are ready, routine care is straightforward.

For suede, it is recommended to brush them after every wear. Use a horsehair brush for dust and a crepe or brass brush to lift compressed nap. Before the first wear, apply a water-repellent spray and reapply every few weeks during wet weather or monthly otherwise. Always insert cedar shoe trees to maintain shape, and let the shoes rest for at least twenty-four hours to absorb moisture. If they get wet, dry them at room temperature with paper inside. Never expose them to direct heat or sunlight, and wait a full day before brushing.

Where the Research Differs

Nubuck also requires the same mandatory waterproofing treatment. It can be oiled or post-treated to maintain its condition. Some suede splits come pre-treated for rain resistance, which is a valuable feature.

Sources often differ on finer details. For instance, most agree that nubuck is tougher due to its dense grain layer, but one source notes that suede resists stains and sunlight slightly better. On feel, one description calls suede plush and velvety while describing nubuck as closer to smooth leather. Another source says nubuck feels softer to the touch due to the light sanding. Based on these differences, if you prioritize structural toughness, nubuck is the better choice. If you care more about stain and sun resistance, suede is preferable. Choose the material that best matches your needs.

Related on Shoes Bible: 2026 Footwear Trends: Sneakerinas, Slim Retro Styles, and Lace-Up Heels, Shoe Sizing, Conversion, and Fit: A Complete Reference, How to Clean and Maintain Suede Footwear, How to Style Loafers for Fall.