UN20901｜Men's Sports Tight Long Sleeve Base Layer

I. Basic Product Specifications

Product Name: Men's Sports Tight Long Sleeve Base Layer
Style No.: UN20901
Fabric:
1. Main body: 200g 82% Polyester + 18% Spandex
2. Underarm mesh panel: 200g 87% Polyester + 13% Spandex Butterfly Mesh Fabric
Sizes: S–XXL
Key Features: Zoned differentiated functional fabric, underarm butterfly mesh ventilation, high-elastic muscle compression, flatlock stitching, quick moisture wicking & fast drying, slim-fit versatile base layer, wear & deformation resistance
Applicable Scenarios: Road cycling sweat-wicking base layer, gym cardio & strength training, ball games, daily commuting in spring & autumn, outdoor hiking & endurance sports

II. Product Overview

The UN20901 is a professional men’s sports tight long sleeve base layer featuring zoned differentiated knitted fabric. The main body adopts high-elastic, smooth and wear-resistant material, while the underarm gussets are spliced with exclusive breathable butterfly mesh fabric, balancing muscle compression support and targeted high-heat ventilation. Adopting full-process flatlock stitching, the garment delivers excellent elasticity and quick-dry performance. The tailored tight fit works perfectly as a skin-friendly inner layer for cycling, fitness and ball sports. It provides moderate muscle compression to relieve exercise fatigue, rapidly evaporates sweat and eliminates sticky dampness. Clean and non-bulky, it serves as a multi-functional base layer for both professional training and daily casual wear all year round.

III. Zoned Fabric Performance Breakdown

1. Main Body Fabric: 200g 82% Polyester + 18% Spandex
The high-polyester knitted base features outstanding wear resistance and anti-pilling performance, resisting abrasion, damage and deformation from long-term training and outer layer friction. The fiber’s capillary moisture-conducting structure quickly absorbs surface sweat and accelerates evaporation, effectively preventing cold and sticky discomfort caused by wet fabric clinging to the skin. Blended with 18% high-quality spandex, the fabric delivers 4-way stretch elasticity, allowing free extension during raising arms, bending, twisting and other dynamic movements without tight restriction. It maintains stable resilience and does not loosen or deform after repeated washing and long-term wear. Moderate muscle compression restricts tremors in torso and arm muscle groups, reducing invalid physical consumption and delaying limb soreness and fatigue during prolonged exercise.

2. Underarm Butterfly Mesh Fabric: 200g 87% Polyester + 13% Spandex
The underarm high-sweat areas adopt exclusive hollow butterfly mesh weaving. The 3D porous structure greatly expands air circulation, specifically solving common sports problems such as underarm heat accumulation, sweat buildup and odor generation during frequent arm movement. The lightweight mesh reduces underarm wearing burden with zero pressure. Moderate elasticity adapts to high-frequency swinging and stretching movements in cycling, fitness and ball games, fitting the skin softly without friction or redness. The reinforced tear-resistant mesh structure maintains stable pore shape and structural integrity after long-term repeated stretching, retaining lasting ventilation and neat fitting.

IV. Functional & Craftsmanship Details

1. Professional Tight Fit, Anti-slip & Non-bulky
The finely knitted surface delivers ultra-smooth and skin-friendly touch without rough irritation, suitable for long-time close-fitting wear. Ergonomic tailoring closely fits men’s torso lines, keeping the fabric stable and wrinkle-free during twisting, bending and lifting movements. When layered under cycling jerseys, fitness jackets or sportswear, it stays flat without fabric accumulation or bulging, ensuring a neat silhouette and stable wearing experience during high-intensity long-duration training.

2. Full-range High-elastic Stretch, Zero Movement Restriction
Both main and underarm fabrics are optimized for elasticity, reserving sufficient stretch margin for dynamic force areas including shoulders, back, waist and arms. The fabric stretches freely during bending, chest expansion, arm swinging and squatting with no tight binding or dragging feeling. Excellent resilience ensures the original slim fit is maintained after repeated stretching and high-intensity exercise, effectively preventing loosening and sagging.

3. Flatlock Stitching for Superior Comfort & Durability
All splicing positions including neckline, body seams and cuffs adopt professional four-needle six-thread flatlock technology. Flat and seamless stitching eliminates raised hard edges and thread friction, preventing skin redness, itching and abrasion. The dense flat seams provide higher tensile strength, resisting thread breakage and cracking during strenuous exercise and repeated washing for extended service life.

4. Zoned Intelligent Temperature Control, All-season Breathability
Adopting functional zoning design, the underarm butterfly mesh focuses on intensive ventilation and heat dissipation, while the dense main body knitting balances basic wind resistance and continuous moisture wicking. In hot summer workouts, it rapidly dispels torso heat and sweat to keep dry; in cool spring and autumn weather, it retains proper body temperature to avoid cold wind discomfort, adapting to different temperatures and exercise intensities throughout the year.

5. Rapid Moisture Absorption & Quick Drying, Odor Resistant
Leveraging the excellent capillary moisture-wicking properties of polyester fiber, the fabric instantly absorbs surface sweat and accelerates evaporation to eliminate sticky dampness. Efficient moisture management greatly reduces bacterial growth and odor accumulation in hot and humid environments, maintaining dry and breathable skin sensation during long-duration high-intensity exercise.

6. Minimalist Slim Fit, Versatile Layering Base
Optimized for men’s athletic body shapes, the tailored fit offers proper tightness — supportive without restricting breathing, fitted without flapping in the wind. The minimalist solid color design matches all kinds of sports outerwear perfectly, ideal for cycling, fitness and ball game layering. It also adapts to daily commuting and outdoor hiking, realizing multi-scenario wearing and high practicality.

V. Target Users & Applicable Scenarios

Target Users: Male road cycling enthusiasts, gym cardio/strength trainers, basketball & badminton players, commuters needing all-season sports base layers, outdoor endurance sports lovers.

Applicable Scenarios: Sweat-wicking base layer for road cycling, professional gym training, ball game wear, daily commuting in spring & autumn, outdoor hiking endurance travel, daily light fitness.

Wearing Experience Notes: Zoned fabrics precisely match sports demands — the main body provides compression shaping and muscle fatigue relief, while the underarm butterfly mesh delivers targeted ventilation to eliminate underarm sweat and odor. Seamless flatlock stitching ensures friction-free all-day comfort, and high-elastic fabric allows full-range movement without restriction. Constant quick-dry performance keeps the body dry at all times. Versatile and practical, it is a must-have all-season sports base layer for men.