Ready to outrun the competition? Step up your triathlon game with our New England Endurance Events running socks — crafted exclusively for athletes like you! Each pair brings a spring to your step, offering the perfect blend of compression and cushion for unrivaled comfort and performance. Whether you're chasing an age group award or just running errands, these socks will make your feet feel like they're tiptoeing through clouds. Socks fit approximate shoe size 8-10.

Celebrate your achievement with the Sea to Summit Triathlon Race Sweatshirt. Designed for both performance and comfort, this sweatshirt is crafted with soft, moisture-wicking fabric showcasing the Sea to Summit logo and distances on the front, with repeating pattern logos on the inside of the hood. 

The sleek, athletic fit and a lightweight design is perfect for layering during those early morning training sessions or for casual wear when you want to show off your Sea to Summit pride. 

Show your support crew pride with these ocean-blue T-shirts from Sea to Summit 2025. Our porter shirts come emblazoned with the S2S logo on the front, and event name and year on the back. Shirts are a 60/40 ring spun cotton/poly blend. Limited quantities available. 

2025 Sea to Summit triathlon shirt

Sea to Summit triathlon 2025: These green athlete shirts come emblazoned with the S2S logo on the front, and event name and year on the back. Shirts are a 60/40 cotton-poly blend. Limited quantities available. 

Our 2025 GutCheck Adventure Triathlon shirts are bright orange to stand out on the road or in the woods. Long sleeve, 100% polyester moisture-management/antimicrobial performance fabric. Unisex sizing, quantities limited. 

We have limited quantities of the 2025 Wellfleet Sprint triathlon race day shirts featuring a true royal blue tie-die. Shirts are unisex sizing, 5.4-ounce, 100% cotton and feature the Wellfleet Sprint Triathlon logo on the front, and sponsors on the back. Proceeds benefit WOMR Community Radio.

Un-dated SwimRun Cape Cod t-shirts come with the S2S logo on the front. Shirts are 100% cotton Gildan softstyle. Limited quantities available. 

Limited quantities of our favorite race shirts are still available from the 2025 Hyannis Triathlons! 100% cotton Gildan Softstyle shirts have a high stitch density, made from soft ring-spun cotton for a modern, classic fit. Shirts feature the Hyannis triathlon logo and race date on the front, and Air Force sponsor logo on the back. 

Limited quantities of our favorite tech race shirts are still available from the 2025 Falmouth Triathlon! Shirts feature the Falmouth triathlon logo and race date on the front, and Air Force sponsor logo on the back. Lightweight and breathable performance fabric that is fast-drying and built for active lifestyles.