QIAODAN Feiying PB5 Men's Marathon Running Singlet

Worn by Elite Runner Jia Erenjia: Engineered for Marathon Peak Performance

This is the official race singlet worn by Chinese elite marathon runner Jia Erenjia at the Boston Marathon. As the lightest, most technically advanced running singlet from QIAODAN Sports, it redefines zero-distraction running, solving the most common pain points for long-distance runners: sweat-soaked sticky fabric, chafing and skin irritation, excess weight that drains your energy, and poor breathability over miles.

Test Report No. from National Textile and Apparel Product Quality Inspection Center: W25005659-2A | Anti-Counterfeiting Code: MT201935453

Exclusive TORAY® Technical Fabric: Industry-Leading Performance

Crafted with exclusive imported TORAY® (Japan) technical fabric, the world's leading textile innovation for athletic apparel, this singlet features a patented three-layer special-shaped cross-section structure with industry-first bionic capillary technology. Lab-tested performance far exceeds industry standards:

• 15x Higher Breathability than the national industry standard (standard value ≥100%)
• 4x Higher Water Absorption than the national industry standard (standard value ≥100%)
• 1.4x Faster Quick-Dry Rate than the national industry standard (standard value ≥0.30)
• 6x Faster Sweat Absorption Speed than standard running fabrics, powered by our exclusive FIELDSENSOR™ moisture management system

Core Elite-Level Performance Technologies

1. Ultra-Lightweight Construction: Barely-There Feel

Weighing just 26g in a size S and only 45g in a size L, this singlet is lighter than most wireless sports earbuds, with virtually no extra weight to hold you back. Five of these singlets weigh the same as a single standard cotton t-shirt. This feather-light design is achieved without sacrificing comfort or durability — it's the perfect balance of performance and comfort for both daily training and competitive racing.

2. Self-Lubricating Anti-Chafe Design: Zero Irritation for Full Marathons

A full marathon requires tens of thousands of steps, with tens of thousands of rubs between your skin and clothing. Our exclusive TORAY® fabric technology delivers a "self-lubricating effect" to eliminate chafing entirely:

• Special fabric weave creates micro-convex structures on the surface, reducing effective skin contact area by 60%
• Plush, soft hand feel that glides smoothly against your skin, drastically reducing friction during long runs
• One-piece seamless cut eliminates all abrasive seams and friction points, for irritation-free comfort even over 42km full marathons

3. FIELDSENSOR™ Moisture Management: No Sticky, Clingy Fabric

Powered by advanced capillary transmission technology, our FIELDSENSOR™ system actively absorbs, transfers, and evaporates sweat away from your skin in seconds:

• Bionic single-guide capillary channels create highly efficient moisture transport, pulling sweat away from your skin 6x faster than standard fabrics
• Perforated design in high-sweat zones enhances airflow and accelerates cooling, keeping you cool and dry even during high-intensity runs
• Eliminates the sticky, clingy feel of traditional singlets after sweating, for consistent comfort from the first mile to the final sprint

4. Elite Racing Tailored Fit

Every detail is engineered for uncompromised performance:

• One-Piece Seamless Cut: Elite racing silhouette that hugs your body without restricting movement, eliminating friction risk for a zero-feel fit
• Narrow Racerback Design: Slimmer back panel than standard singlets, enhancing breathability and full unrestricted shoulder and arm movement for a natural, efficient stride
• Athletic tailored fit that stays in place without riding up or bunching during sprints, long runs, and high-intensity training

Technical Specifications

Perfect For

• Marathon and half-marathon race day and long-distance training
• Track and field training, tempo runs, and high-intensity interval sessions
• Daily road running, gym workouts, and cross-training
• Elite and amateur runners seeking zero-distraction, high-performance running apparel

Care Instructions

Machine wash cold on a gentle cycle. Tumble dry on low heat or air dry for best results. Do not bleach, iron, or dry clean. The premium TORAY® technical fabric retains its moisture-wicking performance, shape, and color after repeated washes.