What materials are your products made from?

Our products are crafted from premium, moisture-wicking fabrics designed for maximum performance and comfort during your workouts.

How do I choose the right size?

Please refer to our detailed size guide available on each product page. We recommend measuring yourself and comparing to our size chart for the best fit.

What is your return policy?

We offer a 30-day return policy on all unworn items with tags attached. Please visit our returns page for full details.

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Petzl NAO® RL (Reactive Lighting) Head Torch

Name: Petzl NAO® RL (Reactive Lighting) Head Torch
Brand: Wood To Water Outdoors
SKU: E105AA00
Price: 125.0 GBP
Availability: InStock

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GymBum UK Size Guide

GYMBUM UK®

Size Guide

1️⃣ Women – Sports Bras

Measure Yourself

For accurate sizing, keep the tape measure level and parallel to the ground.

Bust
Measure around the fullest part of your chest.

Underbust
Measure directly under your bust where the bra band sits.

Body Measurements (Inches)

Size	Bust	Underbust
XS	33–34"	27–28"
S	34–36"	28–30"
M	36–38"	30–32"
L	38–40"	32–34"
XL	40–43"	34–36"
2XL	43–46"	36–39"
3XL	46–49"	39–42"

Between sizes?
Size up for a more comfortable fit.
Size down for a more compressive performance fit.

2️⃣ Women – Tops & T-Shirts

Body Measurements (Inches)

UK Size	Bust	Waist
4–6	31–33"	24–26"
8–10	33–36"	26–28"
12–14	36–40"	28–32"
16	40–43"	32–34"
18	43–46"	34–37"

3️⃣ Women – Leggings & Shorts

Body Measurements (Inches)

UK Size	Waist	Hips
4–6	24–26"	34–36"
8–10	26–28"	36–38"
12–14	28–32"	38–42"
16	32–34"	42–44"
18	34–37"	44–46"

4️⃣ Men – Tops & Hoodies

Size	Chest	Waist
S	36–38"	30"
M	38–40"	32–34"
L	42–44"	36"
XL	46–48"	38"
XXL	50–52"	40–42"

5️⃣ Men – Shorts & Joggers

Size	Waist
S	30"
M	32–34"
L	36"
XL	38"
XXL	40–42"

Fit & Sizing Notes

Some styles follow Asian sizing and may run 1–2 sizes smaller than standard UK sizing.
Refer to each product description for specific fit details.
Measurements may vary slightly depending on fabric and cut.

Ultra-bright and lightweight: 1500 lumens for a weight of only 145 g
Lighting for movement automatically adapts to ambient light:
- Wide, uniform beam so you can comfortably see up-close or at your feet
- Mixed beam (wide and focused) allows for proximity and distance vision for movement
- Three white lighting levels: MAX BURN TIME, STANDARD (better power/burn time balance), and MAX POWER
- Longer burn time, greater visual comfort, and less manual operation with REACTIVE LIGHTING® mode, which allows the light sensor to automatically adjust brightness and beam pattern, optimizing battery usage
- Minimum burn time of 5 hours in REACTIVE LIGHTING® mode (STANDARD level), built to power through long activities like trail running and ultra-running
- Red lighting, continuous or strobe, at the rear of the headlamp, and a separate button to quickly turn it on or off
Ergonomic:
- The battery pack is in the rear to distribute the weight of the headlamp over the entire head, making it balanced and comfortable to wear
- Thin and flexible front plate, to better adapt to different head shapes
- Quick and easy rear adjustment
- Additional top strap for optimal support
- Lithium-ion 3200 mAh battery, rechargeable with a type C USB port
- Spare battery available for long distance trail runs, or simply to switch out the battery when it dies (R1 battery available as an accessory)
- Battery charge indicator with five-level gauge for precise monitoring of the battery charge level
- Rechargeable R1 battery can be used as a spare battery to charge other devices, such as phones or watches
- LOCK function to avoid accidentally turning on the lamp during transit or storage, or to lock lighting settings during your activity
- Reflective headband to remain visible at night
- Storage pouch allows you to turn the headlamp into a lantern in STANDARD mode, or carry an additional battery

Specifications

Brightness: 1500 lumens (ANSI FL 1 STANDARD)
Weight: 145 g
Technology: REACTIVE LIGHTING® or STANDARD LIGHTING
Beam pattern: Wide or mixed
Energy: 3200 mAh lithium-ion rechargeable battery (included)
Charging time: 3.5 h
Watertightness: IPX4 (weather-resistant)
Certification(s): CE

Our products are crafted from premium, moisture-wicking fabrics designed for maximum performance and comfort during your workouts.
Please refer to our detailed size guide available on each product page. We recommend measuring yourself and comparing to our size chart for the best fit.
We offer a 30-day return policy on all unworn items with tags attached. Please visit our returns page for full details.

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Petzl NAO® RL (Reactive Lighting) Head Torch