Custom Cambridge Multi Sport Singlets: Fit and Sizing Guide
By BOA | Running Shorts & Apparel | Made in the USA | Published: 2026-11-01
Category: How-to Guides
Follow this step-by-step process to size custom Cambridge Multi Sport singlets, from reading the size chart to checking Vapor Lite fabric stretch and fit.
Quick answer
Start with the BOA men's tops size chart, measure the chest and waist without a shirt, and choose the size that matches your largest measurement. Then confirm the fit against the Vapor Lite fabric's four-way stretch and perforated panels before submitting your custom order.
Why the size chart is only the starting point
The size chart gives you a baseline, but custom singlets are cut for racing, not for casual wear. A garment that matches your chest measurement may still feel tight across the shoulders if you have a broader upper body. Use the chart as a filter, then use fabric behavior and your sport's fit preference to make the final call.
How Vapor Lite fabric changes the fit decision
The Vapor Lite fabric used in Cambridge Multi Sport singlets is a lightweight polyester with mechanical four-way stretch and perforated front and rear panels. That stretch means a close-fitting singlet can move with you without feeling restrictive, but it also means the fabric will not hide a size that is clearly too small. If you are between sizes, the stretch supports sizing down only when you want a race-tight fit and your measurements are at the lower end of the size range.
When to size up instead of relying on stretch
Size up if your chest measurement falls at the top of a size range, if you plan to wear a base layer underneath, or if you prefer a looser fit for training. The perforated panels improve breathability but do not add coverage, so a singlet that is too small will feel tighter across the chest and may restrict arm movement during longer efforts.
Step-by-step singlet sizing process
- Measure your chest and waist: Use a soft measuring tape around the fullest part of your chest and your natural waist, keeping the tape level and snug but not tight. Measure without a shirt or in a thin base layer. Write down both numbers; you will compare them to the size chart rather than guessing.
- Open the BOA men's tops size chart: Find the size chart linked on the product page and locate the row where your chest measurement fits. If your chest and waist fall into different sizes, choose the size that matches your chest, because the singlet's upper body has less stretch than the waist. Do not size down just because the fabric stretches; the chest measurement is the limiting factor.
- Check the fit against your sport and layers: For track or road racing where you want a close fit, stay with the chart size. For training or if you will wear a base layer, move up one size. The Vapor Lite singlet is designed as a racing layer, so a loose fit may flap. Decide your fit preference before ordering; custom items are harder to exchange.
- Confirm the size with a teammate or coach: If you are ordering for a team, have each athlete measure and compare against the same size chart. Collect sizes in one list and note any athlete who is between sizes so you can apply the same rule consistently. A shared size list prevents individual guesses from creating mismatched team fits.
Product facts
- Men's Custom Vapor Lite Racing Singlet - Pittsley Ben: Crafted from premium Vapor Lite fabric: ultra-lightweight polyester, fully perforated front and rear, with mechanical four-way stretch. The four-way stretch allows a close racing fit, but the perforated panels mean you should still verify chest measurements rather than assuming the fabric will compensate for a small size.
Men's Custom Vapor Lite Racing Singlet - Pittsley Ben
