--- product_id: 551835162 title: "Hair Building Fibers, Dark Brown, 27 grams" brand: "rebuilds" price: "¥4986" currency: JPY in_stock: true reviews_count: 5 category: "Rebuilds" url: https://www.desertcart.jp/products/551835162-hair-building-fibers-dark-brown-27-grams store_origin: JP region: Japan --- # 100% natural keratin fibers Instant thickening under 30s All-day weatherproof hold Hair Building Fibers, Dark Brown, 27 grams **Brand:** rebuilds **Price:** ¥4986 **Availability:** ✅ In Stock ## Summary > ✨ Unlock instant volume and confidence with every shake! ✨ ## Quick Answers - **What is this?** Hair Building Fibers, Dark Brown, 27 grams by rebuilds - **How much does it cost?** ¥4986 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/551835162-hair-building-fibers-dark-brown-27-grams) ## Best For - rebuilds enthusiasts ## Why This Product - Trusted rebuilds brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Instant Confidence Boost:** Transforms thinning hair in less than 30 seconds for a fuller, natural look. - • **Premium Keratin Technology:** Electrostatically charged fibers mimic real hair texture for seamless blending. - • **Gentle & Scalp-Safe Formula:** Free from harsh chemicals and parabens, perfect for sensitive skin and daily use. - • **Weatherproof & Long-Lasting:** Resists wind, light rain, and sweat to keep your style flawless all day. - • **Precision Application Bottle:** Mess-free, targeted coverage for thinning patches, crown, and hairline touch-ups. ## Overview Rebuilds Hair Building Fibers in Dark Brown is a 27g powder made from 100% natural keratin fibers that instantly thickens hair by blending seamlessly with existing strands. Designed for both men and women, it offers a lightweight, weatherproof hold that lasts all day without residue. Safe for sensitive scalps and easy to apply with a precision bottle, it’s the perfect quick-fix solution to conceal thinning areas and boost hair volume effortlessly. ## Description Transform the appearance of thinning hair instantly with Rebuilds Hair Building Fibers (27g). Engineered for both men and women experiencing patchy or sparse hair, this advanced cosmetic hair thickening powder provides an immediate confidence boost. Made from premium, electrostatically charged natural keratin fibers, the powder naturally clings to your existing hair strands like tiny magnets. This creates a seamlessly blended, naturally voluminous look that completely conceals visible scalp patches in just a few quick shakes. Unlike greasy sprays or heavy pastes, Rebuilds Hair Fibers are lightweight, completely undetectable even up close, and leave no sticky residue behind. The long-lasting formula is designed to withstand daily elements including light wind and sweat, keeping your hairstyle intact from morning to night. It washes out effortlessly with any standard shampoo. Whether you want to fill in a widening part line, cover crown thinning, or touch up your hairline before an event, this 27g hair concealer is your ultimate quick-fix solution for fuller, thicker-looking hair every day. Review: rebuilds hair fibres - I have used another brand that is costlier. But Rebuilds is better. it covers the thin patch perfectly. I have gained much confidence ever since I have started using this product. Earlier I would be conscious of the small thinning patch on the top of my head, and it had started to show in pictures. I would find myself unwilling to bow my head so people wouldn't notice the thinning area. This product stays the whole day. I wear this product at the start of the day. I just sprinkle it over the thinning area and it connects with the hair and covers the baldness. Then I shape my hair with application of hair volumizer or hair spray. I set up the hair with hair dryer and I am good to go for the whole long day. The volume stays until you wash your hair. A recommended product which will enhance your confidence in day to day life. Review: Mom like it - I tapped the bottle & sprinkled it in between hair & yes hair looked thicker n wen it settled it was unnoticeable. Gud product fr its price. ## Features - Instant Hair Thickening: Creates the appearance of naturally thick, full hair in under 30 seconds by seamlessly blending with your existing hair strands. - 100% Natural Keratin Fibers: Formulated with high-grade keratin protein fibers that mimic human hair texture for an undetectable, natural finish. - All-Day Weatherproof Hold: Resists wind, light rain, and perspiration so your hair stays full and confident throughout your daily activities. - Scalp Friendly and Safe: Free from harsh chemicals, synthetic dyes, and parabens, making it gentle on sensitive scalps and safe for daily use. - Easy Precision Application: Comes in a 27g mess-free bottle designed for targeted application on thinning patches, crown areas, and hairline touch-ups. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B015CSWBZQ | | ASIN | B015CSWBZQ | | Age Range Description | Adult | | Best Sellers Rank | #219,676 in Beauty ( See Top 100 in Beauty ) #1,693 in Hair Regrowth Treatments | | Brand | Rebuilds | | Customer Reviews | 4.1 4.1 out of 5 stars (552) | | Customer reviews | 4.1 4.1 out of 5 stars (552) | | Date First Available | 13 September 2015 | | Format | Powder | | Is Discontinued By Manufacturer | No | | Manufacturer | Rebuilds | | Manufacturer reference | HAIR FIBER | | Product Dimensions | 13.37 x 8.2 x 5.2 cm; 27 g | | Product Name | HAIR FIBER | | Units | 27.0 Grams | ## Product Details - **Age range (description):** Adult - **Brand:** Rebuilds - **Item form:** Powder - **Item weight:** 27 Grams - **Scent:** Unscented ## Images ![Hair Building Fibers, Dark Brown, 27 grams - Image 1](https://m.media-amazon.com/images/I/41+7mXOH2JL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ rebuilds hair fibres *by A***R on 27 September 2024* I have used another brand that is costlier. But Rebuilds is better. it covers the thin patch perfectly. I have gained much confidence ever since I have started using this product. Earlier I would be conscious of the small thinning patch on the top of my head, and it had started to show in pictures. I would find myself unwilling to bow my head so people wouldn't notice the thinning area. This product stays the whole day. I wear this product at the start of the day. I just sprinkle it over the thinning area and it connects with the hair and covers the baldness. Then I shape my hair with application of hair volumizer or hair spray. I set up the hair with hair dryer and I am good to go for the whole long day. The volume stays until you wash your hair. A recommended product which will enhance your confidence in day to day life. ### ⭐⭐⭐⭐ Mom like it *by D***Y on 5 October 2019* I tapped the bottle & sprinkled it in between hair & yes hair looked thicker n wen it settled it was unnoticeable. Gud product fr its price. ### ⭐⭐⭐⭐⭐ Packaging *by R***I on 25 January 2026* Product is good But packaging is open product Very poor packaging ## Frequently Bought Together - Rebuilds Hair Building Fibers, Dark Brown, 27 grams - Rebuilds Hair Fibers, Black, 27g - KERRATO HAIR FIBRES Unisex Water Resistant Locking Spray for All Hair Building Fibers (100ml) | Strong Hold All Day | Fiber Holding Sray, Hair Spray Pack of 1 --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.jp/products/551835162-hair-building-fibers-dark-brown-27-grams](https://www.desertcart.jp/products/551835162-hair-building-fibers-dark-brown-27-grams) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-11-06*