Velocity 4.0 MTB X-Flow Goggles
Velocity 4.0 MTB X-Flow Goggles

Velocity 4.0 MTB X-Flow Goggles

Sunglass feel with max ventilation and a bulletproof lens.The Velocity 4.0 X-Flow goggle delivers the open, airy...
Availability: In stock
$36.00
$119.99
$36.00
Subtotal: $36.00
Size guide
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Description
Sunglass feel with max ventilation and a bulletproof lens.

The Velocity 4.0 X-Flow goggle delivers the open, airy feel of sunglasses with the full coverage of a goggle. Its fully open upper and lower frame maximizes ventilation, while the wide 50mm mesh strap allows airflow through helmet vents even when covered. The bulletproof 170° WideVision RideViz lens features permanent anti-fog treatment and a scratch-resistant finish for clear, long-lasting vision. Minimal face foam and a contoured fit keep the goggle light and breathable, while OTG compatibility ensures comfort over prescription glasses. Built for riders who want maximum airflow and clarity on hot trail days, the Velocity 4.0 X-Flow combines goggle-level protection with sunglass-level freedom.

Features
• Shape: Medium-Large fit, OTG-over-the-glasses fit
• Lens: Bulletproof 170° WideVision RideViz MTB lens with permanent anti-fog, Laminated scratch resistant coating, Additional Velocity lenses available separately
• Frame construction: Fully open upper and lower frame for ultimate air flow, Self-draining open lower frame design allows dirt to fall from lens
• Strap width: MaxiVent 50mm anti-slip mesh strap to prevent helmet vent blocking
• Face foam layers: Minimal foam placement for an open sunglass feeling, Dual-layer, anti-sweat face foam
• Certifications: Bulletproof Lens impact tested to ANSI Z87.1-2015 and Military Ballistic Impact Standard(MIL-DTL-43511D), Complies with PPE Regulation(EU)2016/425
• Plastic-free packaging

Materials
• Frame-45% TPU80, Strap-28% Polyester Yarn, Lens-22% Polycarbonate, Face Foam-5% Polyester sponge
Velocity 4.0 MTB X-Flow Goggles

Velocity 4.0 MTB X-Flow Goggles

$119.99 $36.00
Velocity 4.0 MTB X-Flow Goggles

Velocity 4.0 MTB X-Flow Goggles

$119.99 $36.00
Size chart
Altitude Sports Outlet — Size Guide

Size Guide

All measurements in inches (in) and pounds (lb). Built for the trail, fitted for you.

Men's Tops & Jackets

Chest: measure around the fullest part. Sleeve: from center back neck to wrist.

Size Chest (in) Waist (in) Sleeve (in)
S 36–38 29–31 32–33
M 39–41 32–34 33–34
L 42–44 35–37 34–35
XL 45–48 38–41 35–36
XXL 49–52 42–45 36–37
Women's Tops & Jackets

Bust: measure around the fullest part. Sleeve: from shoulder seam to wrist.

Size Bust (in) Waist (in) Sleeve (in)
XS 31–32 24–25 30–31
S 33–35 26–27 31–32
M 36–37 28–30 32–33
L 38–40 31–33 33–34
XL 41–43 34–36 34–35
Men's Bottoms (Hiking Pants / Shorts)

Waist: measure around natural waistline. Inseam: from crotch to ankle.

Size Waist (in) Hip (in) Inseam (in)
28 28–29 35–36 30–32
30 30–31 37–38 30–32
32 32–33 39–40 31–33
34 34–35 41–42 31–33
36 36–37 43–44 32–34
38 38–39 45–46 32–34
Women's Bottoms (Hiking Pants / Leggings)

Waist: measure around natural waist. Inseam: from crotch to desired length.

Size Waist (in) Hip (in) Inseam (in)
XS (0–2) 24–25 34–35 29–30
S (4–6) 26–27 36–37 29–30
M (8–10) 28–30 38–40 30–31
L (12–14) 31–33 41–43 30–31
XL (16) 34–36 44–46 31–32
Men's & Women's Shoes (Running / Hiking / Trail)

Foot length: measure heel to longest toe. For hiking boots, size up ½ size.

US Men US Women Foot Length (in) EU
7 8.5 9.6–9.8 40
8 9.5 10.0–10.2 41
9 10.5 10.4–10.6 42
10 11.5 10.8–11.0 43
11 12.5 11.2–11.4 44
12 13.5 11.6–11.8 45
13 — 12.0–12.2 46
Kids' Shoes (Running / Hiking)

Foot length: measure heel to longest toe. Kids grow fast—size up for growing room.

US Kids Foot Length (in) EU
10 6.5–6.7 27
11 6.8–7.0 28
12 7.1–7.3 29
13 7.4–7.6 31
1 7.7–7.9 32
2 8.0–8.2 33
3 8.3–8.5 34
4 8.6–8.8 35
5 8.9–9.1 36
6 9.2–9.4 37
Backpacks (Daypack / Hiking / Camping)

Torso length: measure from C7 vertebra (base of neck) to top of hip bones.

Size Torso Length (in) Capacity (L) Best For
XS / S 15–17 20–35 Day hikes / kids
M 17–19 35–55 Weekend trips
L / XL 19–21 55–75 Multi-day / thru-hikes
Sleeping Bags

User height: measured flat on back. Temperature ratings are guidelines—layer up in cold.

Size User Height (in) Shoulder Girth (in) Temp Rating (°F)
Regular up to 72 60–62 20°F / -6°C
Long up to 78 62–64 20°F / -6°C
Double up to 72 (each) — 30°F / -1°C
Tents (Camping / Backpacking)

Capacity is based on average adult sleepers. Size up for extra gear or pets.

Capacity Floor Area (sq ft) Peak Height (in) Best For
1-Person 15–20 36–40 Solo backpacking
2-Person 25–32 40–44 Couples / duo trips
3-Person 35–45 44–48 Small family
4-Person 50–65 48–56 Family / basecamp
6-Person 75–95 56–68 Group / car camping
Cycling Helmets

Head circumference: measure around forehead, just above eyebrows.

Size Head Circumference (in) Head Circumference (cm)
XS/S 20.0–21.5 51–55
M 21.5–23.0 55–59
L/XL 23.0–24.5 59–63
How to measure. Use a soft tape measure over light clothing. For the most accurate fit, measure twice and compare to the table above.
Between sizes? For tops and jackets, size up if you plan to layer. For hiking boots and trail shoes, size up ½ size to accommodate thicker socks.
Still unsure? Our gear is backed by a 60-day free return policy—find your fit risk-free. Contact support@altitude-sportshub.it.com and we'll help you nail it.

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