Defender One Tour Forest Green Mountain Bike Helmet + Sporter Boostup All Road Goggle
Defender One Tour Forest Green Mountain Bike Helmet + Sporter Boostup All Road Goggle
Defender One Tour Forest Green Mountain Bike Helmet + Sporter Boostup All Road Goggle
Defender One Tour Forest Green Mountain Bike Helmet + Sporter Boostup All Road Goggle
Defender One Tour Forest Green Mountain Bike Helmet + Sporter Boostup All Road Goggle
Defender One Tour Forest Green Mountain Bike Helmet + Sporter Boostup All Road Goggle
Defender One Tour Forest Green Mountain Bike Helmet + Sporter Boostup All Road Goggle
Free Sports Towel & Tote Bag, Limited Time Only

Defender One Tour Forest Green Mountain Bike Helmet + Sporter Boostup All Road Goggle - Forest Green + Polar Light / M (55-58CM)

$180.00 USD $230.00 USD
COMBOSave $50.00

Shipping calculated at checkout

SKU: DP-DFD-OET-HMT-GN-M-VA305, DP-SPT-BU-FBL-LS316GN-VA210
Color:Forest Green + Polar Light
Size:M (55-58CM)

Buy with Confidence

Our 60-day fit guarantee, free exchange & no-hassle returns

Size Guide

To ensure optimal comfort and protection, please refer to the Dotphy size guide. We recommend trying on the product whenever possible. Each helmet product page includes internal dimension ratios to help you better match your head shape.

MTB Helmet Size Chart
Size Head Circumference
M 55–58 cm
L 59–62 cm
Fit Tip: MTB Helmet

MTB helmets should fit snugly for technical trails and bumpy terrain. Make sure the helmet sits low and level, with minimal movement when shaken. Choose a size that provides firm coverage without pressure.

Road Helmet Size Chart
Size Head Circumference
M 55–58 cm
L 59–61 cm
Fit Tip: Road Helmet

Road cycling helmets prioritize aerodynamics and lightweight feel. The helmet should sit close to the head without gaps, secure during head movement, and allow airflow for long-distance comfort.

Full-Face MTB Helmet Size Chart
Size Head Circumference
M 55–58 cm
L 59–61 cm
Fit Tip: Full-Face Helmet

Full-face helmets should fit snugly around the cheeks and crown without gaps. Ensure the chin bar feels secure but not tight, and there’s no excessive movement during head turns or jumps.

Snow Helmet Size Chart
Size Head Circumference
M 55–59 cm
L 59–63 cm
Fit Tip: Snow Helmet

Snow helmets need room for warmth and goggle compatibility. Make sure the fit is not too tight when worn with a balaclava or beanie. The helmet should sit comfortably above the eyebrows and align with goggle straps.

Asian Fit Note

Dotphy helmets are developed with head shape diversity in mind. Asian users typically have a rounder head shape and shorter front-to-back ratio compared to European users. Each helmet product page includes internal fit dimensions to help ensure the best match for your head shape. If you fall between sizes, prioritize internal width and frontal coverage for comfort.

How to Measure Your Head
  1. Use a soft measuring tape or string.
  2. Wrap it around your head about 2 cm above the eyebrows and ears, keeping it level.
  3. Check your measurement in centimeters and compare it to the chart above.

Tip: Try on the helmet with the fit system loosened first. The shell should rest evenly around your head, with adjustability to tighten securely without discomfort.

Snow Goggle Size Chart

Choose the right goggle frame for your face size and helmet fit. Goggles should create a full seal around your eyes without pressure points or gaps.

Small Frame

Best for youth and adults with narrow or smaller faces.

Medium Frame

The most common size for adults. Unisex fit with balanced field of view and comfort.

Large / Oversized Frame

Offers maximum peripheral vision, ideal for broader faces. Ensure helmet compatibility before purchase.

OTG (Over-the-Glasses) Goggles

Designed for use over prescription eyewear. These frames offer extra internal space for both glasses and airflow.

Note: Size and fit recommendations are provided for guidance only. Actual fit may vary by model. Please refer to the individual product pages for specific internal sizing details.

Size Guide

To ensure optimal comfort and protection, please refer to the Dotphy size guide. We recommend trying on the product whenever possible. Each helmet product page includes internal dimension ratios to help you better match your head shape.

MTB Helmet Size Chart
Size Head Circumference
M 55–58 cm
L 59–62 cm
Fit Tip: MTB Helmet

MTB helmets should fit snugly for technical trails and bumpy terrain. Make sure the helmet sits low and level, with minimal movement when shaken. Choose a size that provides firm coverage without pressure.

Road Helmet Size Chart
Size Head Circumference
M 55–58 cm
L 59–61 cm
Fit Tip: Road Helmet

Road cycling helmets prioritize aerodynamics and lightweight feel. The helmet should sit close to the head without gaps, secure during head movement, and allow airflow for long-distance comfort.

Full-Face MTB Helmet Size Chart
Size Head Circumference
M 55–58 cm
L 59–61 cm
Fit Tip: Full-Face Helmet

Full-face helmets should fit snugly around the cheeks and crown without gaps. Ensure the chin bar feels secure but not tight, and there’s no excessive movement during head turns or jumps.

Snow Helmet Size Chart
Size Head Circumference
M 55–59 cm
L 59–63 cm
Fit Tip: Snow Helmet

Snow helmets need room for warmth and goggle compatibility. Make sure the fit is not too tight when worn with a balaclava or beanie. The helmet should sit comfortably above the eyebrows and align with goggle straps.

Asian Fit Note

Dotphy helmets are developed with head shape diversity in mind. Asian users typically have a rounder head shape and shorter front-to-back ratio compared to European users. Each helmet product page includes internal fit dimensions to help ensure the best match for your head shape. If you fall between sizes, prioritize internal width and frontal coverage for comfort.

How to Measure Your Head
  1. Use a soft measuring tape or string.
  2. Wrap it around your head about 2 cm above the eyebrows and ears, keeping it level.
  3. Check your measurement in centimeters and compare it to the chart above.

Tip: Try on the helmet with the fit system loosened first. The shell should rest evenly around your head, with adjustability to tighten securely without discomfort.

Snow Goggle Size Chart

Choose the right goggle frame for your face size and helmet fit. Goggles should create a full seal around your eyes without pressure points or gaps.

Small Frame

Best for youth and adults with narrow or smaller faces.

Medium Frame

The most common size for adults. Unisex fit with balanced field of view and comfort.

Large / Oversized Frame

Offers maximum peripheral vision, ideal for broader faces. Ensure helmet compatibility before purchase.

OTG (Over-the-Glasses) Goggles

Designed for use over prescription eyewear. These frames offer extra internal space for both glasses and airflow.

Note: Size and fit recommendations are provided for guidance only. Actual fit may vary by model. Please refer to the individual product pages for specific internal sizing details.

Size Guide

To ensure optimal comfort and protection, please refer to the Dotphy size guide. We recommend trying on the product whenever possible. Each helmet product page includes internal dimension ratios to help you better match your head shape.

MTB Helmet Size Chart
Size Head Circumference
M 55–58 cm
L 59–62 cm
Fit Tip: MTB Helmet

MTB helmets should fit snugly for technical trails and bumpy terrain. Make sure the helmet sits low and level, with minimal movement when shaken. Choose a size that provides firm coverage without pressure.

Road Helmet Size Chart
Size Head Circumference
M 55–58 cm
L 59–61 cm
Fit Tip: Road Helmet

Road cycling helmets prioritize aerodynamics and lightweight feel. The helmet should sit close to the head without gaps, secure during head movement, and allow airflow for long-distance comfort.

Full-Face MTB Helmet Size Chart
Size Head Circumference
M 55–58 cm
L 59–61 cm
Fit Tip: Full-Face Helmet

Full-face helmets should fit snugly around the cheeks and crown without gaps. Ensure the chin bar feels secure but not tight, and there’s no excessive movement during head turns or jumps.

Snow Helmet Size Chart
Size Head Circumference
M 55–59 cm
L 59–63 cm
Fit Tip: Snow Helmet

Snow helmets need room for warmth and goggle compatibility. Make sure the fit is not too tight when worn with a balaclava or beanie. The helmet should sit comfortably above the eyebrows and align with goggle straps.

Asian Fit Note

Dotphy helmets are developed with head shape diversity in mind. Asian users typically have a rounder head shape and shorter front-to-back ratio compared to European users. Each helmet product page includes internal fit dimensions to help ensure the best match for your head shape. If you fall between sizes, prioritize internal width and frontal coverage for comfort.

How to Measure Your Head
  1. Use a soft measuring tape or string.
  2. Wrap it around your head about 2 cm above the eyebrows and ears, keeping it level.
  3. Check your measurement in centimeters and compare it to the chart above.

Tip: Try on the helmet with the fit system loosened first. The shell should rest evenly around your head, with adjustability to tighten securely without discomfort.

Snow Goggle Size Chart

Choose the right goggle frame for your face size and helmet fit. Goggles should create a full seal around your eyes without pressure points or gaps.

Small Frame

Best for youth and adults with narrow or smaller faces.

Medium Frame

The most common size for adults. Unisex fit with balanced field of view and comfort.

Large / Oversized Frame

Offers maximum peripheral vision, ideal for broader faces. Ensure helmet compatibility before purchase.

OTG (Over-the-Glasses) Goggles

Designed for use over prescription eyewear. These frames offer extra internal space for both glasses and airflow.

Note: Size and fit recommendations are provided for guidance only. Actual fit may vary by model. Please refer to the individual product pages for specific internal sizing details.

Size Guide

To ensure optimal comfort and protection, please refer to the Dotphy size guide. We recommend trying on the product whenever possible. Each helmet product page includes internal dimension ratios to help you better match your head shape.

MTB Helmet Size Chart
Size Head Circumference
M 55–58 cm
L 59–62 cm
Fit Tip: MTB Helmet

MTB helmets should fit snugly for technical trails and bumpy terrain. Make sure the helmet sits low and level, with minimal movement when shaken. Choose a size that provides firm coverage without pressure.

Road Helmet Size Chart
Size Head Circumference
M 55–58 cm
L 59–61 cm
Fit Tip: Road Helmet

Road cycling helmets prioritize aerodynamics and lightweight feel. The helmet should sit close to the head without gaps, secure during head movement, and allow airflow for long-distance comfort.

Full-Face MTB Helmet Size Chart
Size Head Circumference
M 55–58 cm
L 59–61 cm
Fit Tip: Full-Face Helmet

Full-face helmets should fit snugly around the cheeks and crown without gaps. Ensure the chin bar feels secure but not tight, and there’s no excessive movement during head turns or jumps.

Snow Helmet Size Chart
Size Head Circumference
M 55–59 cm
L 59–63 cm
Fit Tip: Snow Helmet

Snow helmets need room for warmth and goggle compatibility. Make sure the fit is not too tight when worn with a balaclava or beanie. The helmet should sit comfortably above the eyebrows and align with goggle straps.

Asian Fit Note

Dotphy helmets are developed with head shape diversity in mind. Asian users typically have a rounder head shape and shorter front-to-back ratio compared to European users. Each helmet product page includes internal fit dimensions to help ensure the best match for your head shape. If you fall between sizes, prioritize internal width and frontal coverage for comfort.

How to Measure Your Head
  1. Use a soft measuring tape or string.
  2. Wrap it around your head about 2 cm above the eyebrows and ears, keeping it level.
  3. Check your measurement in centimeters and compare it to the chart above.

Tip: Try on the helmet with the fit system loosened first. The shell should rest evenly around your head, with adjustability to tighten securely without discomfort.

Snow Goggle Size Chart

Choose the right goggle frame for your face size and helmet fit. Goggles should create a full seal around your eyes without pressure points or gaps.

Small Frame

Best for youth and adults with narrow or smaller faces.

Medium Frame

The most common size for adults. Unisex fit with balanced field of view and comfort.

Large / Oversized Frame

Offers maximum peripheral vision, ideal for broader faces. Ensure helmet compatibility before purchase.

OTG (Over-the-Glasses) Goggles

Designed for use over prescription eyewear. These frames offer extra internal space for both glasses and airflow.

Note: Size and fit recommendations are provided for guidance only. Actual fit may vary by model. Please refer to the individual product pages for specific internal sizing details.

Gear up for your sports adventures with the Defender One Tour Mountain Bike Helmet and Sporter Boostup All Road Goggle bundle. This dynamic duo provides double the protection and compatibility for a comfortable day on the mountain. With less fogging and more budget-friendly options, you can focus on the thrill of the ride.

Defender One Tour MTB Helmet:
  • Tough injection-molded shell offers impact and drop resistance
  • Lightweight interior EPS foam efficiently absorbs shock and reduces pressure for wearing
  • 22 vents brings outstanding moisture-wicking ability to keep your head cool and comfortable
  • Recessed channels make smooth air flow; the front channel allows for eyewear storage
  • Adjustable visor with 3 adjustable position to block the sun and rain to protect your eyes
  • Soft cushions inside the helmet reduces friction and shock
  • Size adjustment dial helps you find the perfect fit
  • Available for mounting camera and light
  • Compatible with eyewear and goggles
  • Unisex style
  • Certifications: CPSC, CE EN 1078, AS/NZS 2063
Sporter Boostup All Road Goggle:
Interchangeable Lens System

Each Boostup goggle consists of two different lenses which are interchangeable to offer respective protection for snow sports, mountain biking, and motocross sports. You can have a quick mode switch of the sports through its consciously-designed structure.

Mirror Lens:
  • PC+CA dual-layered lens
  • Anti-fog treatment
  • Mirrored coating against UV, glare and harmful sunlight
  • Suitable for snow sports, mountain biking, and motocross sports
Roll-Off Lens:
  • 0.75mm thickness Sabic Lexan PC lens with anti-scratch and anti-fog Coating
  • Clear peripheral vision
  • Suitable for mountain biking, and motocross sports only
Roll-Off System

The roll-off lens comes with a roll-off film that is disposable and transparent to keep your vision clear by keeping off the flying debris and mud when you are racing on a very muddy track. It is attached to the sides of the lens and can be advanced by pulling the pull cord. This system can decrease eye injuries and keep you focus on your races.

Outrigger Strap System

The outriggers are adjustable to fit different-sized helmets and to reach the ideal balance when you ride. Besides, the strap is detachable for cleaning purpose so you don’t have to get wet the lens and face foam after riding in conditions like mud tracks and rainy days.

Ventilation System

The vents can be switched on/off to control the airflow, which ensures great breathability to help you find the best comfort in your sports, particularly perfect for biking in hot summer.

Nosepiece Adjustment System

The nosepiece adopts soft TPU with 3 position adjustments to ergonomically fit different nose bridges for a wide range of athletes.

When you receive the bundle, you will get...
  • Defender One Tour bike helmet
  • Sporter Boostup goggle with roll-off clean lens
  • Extra replacement mirror lens
  • Double layer microfiber bag
  • EVA storage case
  • Bonus: stickers and cup coaster
SKU:

Please confirm the above SKU number with us before you make a return/replace order.