GymBumUK Active Performance Tee

GymBumUK Active Performance Tee

Engineered with purpose. Worn with confidence

Regular price £24.99 GBP
Regular price Sale price £24.99 GBP
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Shipped by GymBum UK

Size chart

    GymBum UK Size Guide

    🧡 GymBum UK Sports Bra Size Guide

    Size Chest (inches) Underbust (inches)
    XS 33 ⅛ 27 ½
    S 34 ⅝ 29 ⅛
    M 36 ¼ 30 ¾
    L 39 ⅜ 33 ½
    XL 42 ½ 36 ¼
    2XL 45 ⅝ 39
    3XL 48 ⅞ 41 ¾

    🧍♀️ Women’s Activewear

    UK US EU Asian Tops / Bras Leggings / Shorts Trainers (UK/EU/US)
    4–6 0–2 32–34 S XS XS 3.5 / 36 / 5
    8–10 4–6 36–38 M S S 4–5.5 / 37–38 / 6–7.5
    12–14 8–10 40–42 L M M 6–7.5 / 39–40 / 8–9.5
    16 12 44 XL L L 8–8.5 / 41–42 / 10–11
    18 14 46 XXL XL XL 9–9.5 / 43–44 / 11.5–12

    🧍♂️ Men’s Activewear

    UK US EU Asian Tops / Hoodies Shorts / Joggers Trainers (UK/EU/US)
    S S 46 M 36–38" Chest 30" Waist 6–7 / 39–40 / 7–8
    M M 48–50 L 38–40" Chest 32–34" Waist 8–9 / 41–42 / 9–10
    L L 52 XL 42–44" Chest 36" Waist 10 / 43–44 / 11
    XL XL 54 XXL 46–48" Chest 38" Waist 11 / 45–46 / 12
    XXL XXL 56 3XL 50–52" Chest 40–42" Waist 12–13 / 47–48 / 13–14

    🧵 Fit Notes

    • Asian sizes typically run 1–2 sizes smaller than UK sizing.
    • For a performance fit, choose your regular UK size.
    • For a relaxed fit, size up.
    • Measurements are approximate and may vary slightly by fabric and style.

    Fit Tip: Some of our activewear follows Asian sizing (approx. 1–2 sizes smaller than UK). Refer to the GymBum Size Guide for accurate conversions.

    Power through your day in the GymBumUK Active Performance Tee—the ultimate all-rounder for fitness and lifestyle. Built from 100% polyester, this shirt features cutting-edge QuickDry technology that keeps sweat at bay, so you stay cool and confident through grueling workouts and casual moments alike. The lightweight, breathable fabric moves with you, while the clean GymBumUK logo adds understated style. Whether you're crushing cardio, hitting the weights, running outdoors, or just hanging out, this versatile unisex tee delivers comfort and performance without compromise. Durable, stylish, and ready for anything—it's the go-to piece for active living.

    Size guide

      LENGTH (inches) CHEST (inches)
    S 27 ½ 31-34
    M 28 ⅜ 35-38
    L 29 ⅛ 39-41
    XL 29 ⅞ 42-45
    2XL 30 ¾ 46-48
      LENGTH (cm) CHEST (cm)
    S 70 78.7-86.4
    M 72 89-96.5
    L 74 99-104.1
    XL 76 106.7-114.3
    2XL 78 116.8-122

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    FREE UK Shipping on Orders £50+

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    Official GymBum UK® — Registered Brand

    FREE UK Shipping on Orders £50+

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    Official GymBum UK® — Registered Brand

    FREE UK Shipping on Orders £50+

    Order Before 3PM — Same-Day Dispatch

    Official GymBum UK® — Registered Brand

    FREE UK Shipping on Orders £50+

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    Official GymBum UK® — Registered Brand