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SFL Specific Performance Shirt – Be the Captain of Your Own Health ⚓💪
At Stronger For Longer, we believe your health, performance, and longevity are in your hands — and we’re here to give you the tools to own it. The SFL Specific Performance Shirt is designed for those who take their training, recovery, and lifestyle seriously. Crafted from 100% recycled polyester, this moisture-wicking, UPF50+ performance shirt keeps you cool, protected, and ready to tackle the day — whether you’re training hard or navigating life’s adventures.
With a relaxed fit, two-way stretch fabric, and rounded shoulder yoke, this shirt moves with you and represents your commitment to optimization and longevity, on and off the field.
Why You’ll Love It
✅ 100% recycled polyester fabric — eco-conscious performance 🌱
✅ Moisture-wicking & quick-drying — stay cool through any workout
✅ Two-way stretch for freedom of movement
✅ UPF50+ protection — built-in sun defense for outdoor training ☀️
✅ Relaxed fit with a V-neck collar for all-day comfort
✅ OEKO-TEX 100 & Global Recycled Standard certified — ethical & sustainable
Sustainably Made to Order
Each SFL Specific Performance Shirt is made on demand, reducing waste and ensuring every piece is created with purpose — just like the mission you’re on.
At Stronger For Longer, we do more than apparel and supplements — we’re your partner in building a stronger body, sharper mind, and longer, healthier life. As a veteran-owned brand with Special Operations roots, we’re proud to help you own your health, optimize your performance, and maximize your longevity.
📧 Got questions or want help building your complete performance stack? Let’s talk.
Email: sflsupps@gmail.com
Instagram: @strongerforlongernutrition
TikTok: @sflnutrition
Size guide
CHEST (inches) | WAIST (inches) | HIPS (inches) | |
2XS | 34 ⅝ | 28 ⅜ | 35 ⅜ |
XS | 36 ¼ | 29 ⅞ | 37 |
S | 37 ¾ | 31 ½ | 38 ⅝ |
M | 39 ⅜ | 33 ⅛ | 40 ⅛ |
L | 42 ½ | 36 ¼ | 43 ¼ |
XL | 45 ⅝ | 39 ⅜ | 46 ½ |
2XL | 48 ⅞ | 42 ½ | 49 ⅝ |
3XL | 52 | 45 ⅝ | 52 ¾ |
4XL | 55 ⅛ | 48 ⅞ | 55 ⅞ |
5XL | 58 ¼ | 52 | 59 |
6XL | 61 ⅜ | 55 ⅛ | 62 ¼ |
CHEST (cm) | WAIST (cm) | HIPS (cm) | |
2XS | 88 | 72 | 90 |
XS | 92 | 76 | 94 |
S | 96 | 80 | 98 |
M | 100 | 84 | 102 |
L | 108 | 92 | 110 |
XL | 116 | 100 | 118 |
2XL | 124 | 108 | 126 |
3XL | 132 | 116 | 134 |
4XL | 140 | 124 | 142 |
5XL | 148 | 132 | 150 |
6XL | 156 | 140 | 158 |
Pairs well with

SFL Gen 2 Hockey Jersey
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Veteran-owned & operated since 2022
Nutrition. Fitness. Optimization. Longevity.
Proprietary Blends, Ayurvedic Sources & Science-Backed Formulations
Made in USA, Third-Party Tested, FDA Compliant, GMP & Fair Trade
Free Shipping Over $75. Save 25% with 10+ Items at Checkout
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SFL Policies. If you have a question, comment, or concern, please contact us.
Have a question about a supplement?
Free Health Consult
Contact us to get SFL into your store, or ask about ingredients, sourcing, bulk orders or benefits. We'll respond within 24-hours.

Proudly made in the USA. Veteran-owned, operated and founded.
SFL was crafted from a deepening need for a trusted brand in the supplement market for athletes, moms, military members and the everyday American. We craft premium products that matter.
In a world with too many ingredients being chemically altered - and from overseas, we sought to be the change we sought as athletes, moms, dads ourselves. SFL is for you - the everyday American, athlete, entrepreneur, family member, citizen & more.
SFL Product Details
Where are your products made?
Stronger For Longer, a proud veteran-owned brand located in Golden, Colorado, is dedicated to delivering exceptional nutrition, optimization, and longevity products. With a deep commitment to quality and transparency, we create all-natural products using only premium, responsibly sourced ingredients. Our manufacturing processes strictly adhere to GMP (Good Manufacturing Practices) and fair trade agreements, ensuring ethical sourcing and production standards.
To guarantee the utmost quality and safety, we implement rigorous random QA testing throughout every stage of production. Our goal is to provide you with products you can trust, crafted with care and precision to help you achieve your health and wellness goals. At Stronger For Longer, your well-being is our top priority.
Are you FDA Compliant?
Stronger For Longer, a proud veteran-owned brand based in Golden, Colorado, is committed to producing high-quality, all-natural nutrition, optimization, and longevity products. Yes, we are FDA-compliant, ensuring all our products meet the highest safety and regulatory standards.
Our manufacturing process adheres to strict Good Manufacturing Practices (GMP), which means every product is crafted in a clean, controlled environment using premium ingredients that are responsibly sourced and ethically produced. To maintain our commitment to quality, we conduct rigorous random QA testing throughout every stage of production, ensuring that each product is safe, effective, and consistent.
At Stronger For Longer, we take extensive care in formulating every product. Our team conducts thorough research, relying on the latest scientific advancements and nutritional studies to develop innovative solutions designed to support your health and wellness. This dedication to excellence ensures that every product we offer is not only trustworthy but also helps you optimize your performance and longevity.
Are these supplements tested?
Yes, all Stronger For Longer products are thoroughly researched and tested. With our extensive backgrounds as 18 Bravos and 18 Echo, combined with medical school education, both Phil and Cam bring unparalleled expertise and commitment to every product we create. Our experience spans both military and civilian sectors, enabling us to apply a unique perspective to health, wellness, and optimization.
We dedicate ourselves to meticulous personal research to develop formulaic blends that prioritize quality and effectiveness. Many of our products contain up to 2x the standard dose of certain herbs, minerals, and vitamins to ensure maximum benefit while minimizing potential downsides. We believe in the power of education and transparency, ensuring each formula is backed by science and designed to truly make a difference.
As part of our commitment to excellence, we personally test every product to ensure it meets our high standards before it reaches you. At Stronger For Longer, you can trust that every product reflects our unwavering dedication to quality, research, and results.
Does SFL offer returns?
Yes, Stronger For Longer does accept returns, and we proudly offer a 30-day money-back guarantee. If you’re not completely satisfied with your product, we’ll make it right. Whether you choose to keep the product or return it, we’ll credit you back the original cost—no questions asked. We also invite you to try another product, tailored to your specific needs, at no additional cost.
This one-time courtesy reflects our commitment to your satisfaction and health journey. We understand that everyone is different and may experience varying results. Our team is happy to work with you to recommend the product best suited to your goals and needs. At Stronger For Longer, your trust and satisfaction are our top priorities