Here is an optimized, high-converting product title and description for your Shopify store, NLWstore, tailored for this ultra-lightweight performance running t-shirt.

Since the technical specifications reveal a premium Polyester, Spandex, and Nylon blend weighing a featherlight 110 grams, I have heavily spotlighted this high-end fabric matrix for its icy-cool touch, extreme 4-way stretch, and weightless feel.

🏷️ Optimized Product Title

NLW Ultra-Lightweight Fast-Drying Running T-Shirt – 110g High-Stretch Knit Gym Fitness Tee

(Alternative version: Men's Summer Performance Sports T-Shirt – Breathable Nylon-Spandex Blend Training Top Up to 4XL)

🛍️ Product Description

Featherlight Build. High-Velocity Moisture Control.

Break through your personal barriers without being weighed down by the NLW Ultra-Lightweight Fast-Drying Running T-Shirt. Tipping the scales at a featherlight 110 grams, this performance short-sleeve tee is specifically engineered to handle grueling summer sprints, high-mileage road runs, and intense gym training. Crafted using a premium athletic knit technique from a highly advanced blend of Nylon, Polyester, and Spandex, it delivers an instantly cooling, fluid drape that stretches effortlessly with your body while keeping you completely bone-dry.

✨ Why It’s an NLW Essential:

• Featherlight 110g Construction: Experience a true weightless feel. The ultra-thin fabric layout sits effortlessly against your body, eliminating heavy, clinging material drag during your longest runs.

• Premium Tri-Blend Performance: Fusing the rugged durability of Polyester, the icy-cool touch of Nylon, and the deep, responsive 4-way stretch of Spandex for an elite, high-end athletic texture.

• Advanced Fast-Drying Knit Craft: Engineered with a high-ventilation knit weave that continuously circulates fresh air while pulling sweat away from your skin for lightning-fast evaporation.

• Friction-Free Structural Fit: Features highly flexible, smooth athletic seams that lay perfectly flat against your skin, eliminating painful chafing, hotspots, or underarm irritation.

• Inclusive Size Range Up to 4XL: Built to offer a structured, physique-flattering athletic cut that fits perfectly true to size from standard builds up to a commanding 4XL.

📐 Specifications & Features

• Brand: NLW Exclusive (Summer Performance Series)

• Item Type: Men's Fast-Drying Running T-Shirt / Gym Training Tee

• Material Matrix: Premium Tri-Blend (High-Grade Polyester, Cooling Nylon & Elastic Spandex)

• Fabric Weight: Ultra-lightweight 110g performance layout

• Craftsmanship: Fine athletic circular Knit weave

• Fit Profile: True to Size (Available from Size M up to Plus Size 4XL)

• Packaging: Shipped brand new in a protective, secure OPP bag

• Best For: Long-Distance Running, Sprints, Gym Weightlifting, Cross-Functional Fitness, Trail Hiking, and Hot-Weather Outdoor Sports.

NLWstote tips: To permanently preserve the elite 110g lightweight structure and protect the high-stretch Spandex fibers, machine wash this shirt inside out in cold water. Avoid using heavy liquid fabric softeners, and tumble dry on low heat or hang to air dry—due to its quick-dry weave, it will naturally line dry in just minutes!