Alessandra Ambrosio in Under Armour Threadborne Fortis 3: Athleisure Styling Guide

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When it comes to functional off-duty style, Alessandra Ambrosio often leans into monochromatic layers that bridge the gap between high-intensity training and casual recovery.

On October 27, 2020, in Los Angeles, the model was photographed transitioning from a morning workout to the coast, opting for a technical ensemble rooted in neutral tones. Her look serves as a consistent reference for styling performance gear without sacrificing a cohesive aesthetic.

Alessandra Ambrosio keeps her workout palette sleek and tonal in gray Splendid leggings and Under Armour Threadborne Fortis 3 sneakers while leaving a Los Angeles gym on October 27, 2020Alessandra Ambrosio keeps her workout palette sleek and tonal in gray Splendid leggings and Under Armour Threadborne Fortis 3 sneakers while leaving a Los Angeles gym on October 27, 2020 (Credit: Instar / WENN)

For her gym session, Alessandra wore a pair of skintight gray leggings from Splendid. She paired the look with a matching Splendid Nina bra top layered under a heather-gray Alo Yoga Peek pullover.

Stepping out with a pink face mask, Alessandra Ambrosio styled her monochrome activewear look with streamlined running shoes and an orange Bandolier crossbody strap for contrastStepping out with a pink face mask, Alessandra Ambrosio styled her monochrome activewear look with streamlined running shoes and an orange Bandolier crossbody strap for contrast

To balance the sporty foundation, she accessorized with gold bangles and ombre sunglasses. For utility, she carried an orange Bandolier “Casey” pebble leather crossbody phone case, which provided a sharp contrast to the monochrome gray palette.

The focal point of the outfit’s performance was her choice of footwear: the Under Armour “Threadborne Fortis 3” running shoes.

Alessandra Ambrosio balanced sporty layering with polished accessories, pairing a sculpted gray hoodie with aviator sunglasses and delicate gold jewelryAlessandra Ambrosio balanced sporty layering with polished accessories, pairing a sculpted gray hoodie with aviator sunglasses and delicate gold jewelry

These neutral runners feature a Threadborne-embroidered upper for airflow and a dual-layer “Charged Cushioning” midsole.

This specific construction is designed for a balance of impact absorption and energy return, making them a versatile choice for both gym floors and pavement.

Alessandra Ambrosio completed her gym-ready outfit with pale gray Under Armour Threadborne Fortis 3 running shoes featuring lightweight knit uppers and cushioned athletic solesAlessandra Ambrosio completed her gym-ready outfit with pale gray Under Armour Threadborne Fortis 3 running shoes featuring lightweight knit uppers and cushioned athletic soles

Beyond the cushioning, the sneakers feature anatomically-placed flex grooves and multi-surface traction outsoles, allowing for natural foot movement during lateral drills or sprints.

The Under Armour Threadborne Fortis 3 running shoes combine lightweight knit construction with cushioned midsoles and tonal gray detailing for a streamlined performance-driven finishThe Under Armour Threadborne Fortis 3 running shoes combine lightweight knit construction with cushioned midsoles and tonal gray detailing for a streamlined performance-driven finish

Later that day, Alessandra moved to Santa Monica Beach for a beach volleyball session.

Alessandra Ambrosio transitioned from gym mode to beach volleyball in Santa Monica, swapping leggings for relaxed sweatpants while keeping her sporty gray Splendid bra topAlessandra Ambrosio transitioned from gym mode to beach volleyball in Santa Monica, swapping leggings for relaxed sweatpants while keeping her sporty gray Splendid bra top

Swapping the leggings for gray drawstring sweatpants and adding protective navy arm sleeves, she kept the same Splendid sports bra, demonstrating the versatility of her initial gym base layer.

Alessandra Ambrosio played beach volleyball barefoot in Santa Monica, pairing rolled gray sweatpants with a fitted sports bra and athletic arm sleeves for a streamlined coastal training lookAlessandra Ambrosio played beach volleyball barefoot in Santa Monica, pairing rolled gray sweatpants with a fitted sports bra and athletic arm sleeves for a streamlined coastal training look

How Alessandra Ambrosio Turned Performance Sneakers Into an Off-Duty Signature

From monochrome gym layers to fashion-forward running shoes, Alessandra Ambrosio has spent years refining a version of athleisure that feels equally practical and polished.

Whether she’s leaving a workout, heading to the beach, or styling technical sneakers with elevated basics, her off-duty wardrobe consistently shows how performance footwear became part of everyday celebrity dressing in the 2010s and beyond.

Explore more of Alessandra’s standout sneaker, activewear, and off-duty fashion moments below.

👠 Explore Alessandra Ambrosio’s Best Off-Duty Shoe & Athleisure Moments: