Mythic Ultra Down Sleeping Bag -6°C/21°F
Mythic Ultra Down Sleeping Bag -6°C/21°F

Mythic Ultra Down Sleeping Bag -6°C/21°F

Our Mythic sleeping bags redefine warmth for weight, meticulously shaving grams and minimising pack size to bring...
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$247.50
$824.99
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Description
Our Mythic sleeping bags redefine warmth for weight, meticulously shaving grams and minimising pack size to bring you performance without penalty.

Every detail of the Mythic has been designed to reduce weight and bulk, drawing on over 40 years of hard-won expertise. It’s filled with high-quality 900FP down, which offers superb warmth for its weight, in our groundbreaking L.O.F.T 3D™ construction. This unique technology uses twisted, helix-shaped baffles to create funnel points within the bag, which prevent down from migrating and keep it evenly distributed. Combined with a TILT lining that reflects heat back towards your body, this allows us to achieve an unrivalled warmth-to-weight ratio. Light on grams but not on functionality, the Mythic is finished with a Pertex® Quantum ripstop fabric to ensure it stands up to mountain environments. Ultralight, stripped-back, and uncompromisingly warm, it’s ideal for moving fast in cool conditions, from fastpacking to alpinism. Hand-filled in the UK, all our down bags benefit from never having had their down compressed before use, preserving its loft and warmth.

Features
• Activities: Fast & light adventures, Trekking
• Pioneering L.O.F.T 3D™ construction features helix-shaped baffles that prevent down migration and maximise warmth retention
• Built with a heat-reflective TILT lining, minimising radiant heat loss for virtually no extra weight
• Sleep comfortably on your side thanks to the sidewall baffles, which reduce cold spots and ensure you’re not lying on a seam
• Cinch in the hood to seal in the heat, while the down-filled collar sits snugly around your neck
• The tapered mummy shape is incredibly efficient on pack size
• ½ length zip features an insulated zip baffle to prevent cold spots when the temperature drops
• Internal cordlocks positioned below your collar bone for greater side sleeping comfort
• Anatomically shaped foot box allows you to sleep in a relaxed position
• Lightweight dry bag compression stuff sack
• Zipped storage sack with water-resistant base for home storage
• Hand-filled in Derbyshire UK
• Fluorocarbon(PFAS)free fabric
• Fluorocarbon(PFAS)free product
• Made with renewable energy

Materials
• Main: 10D Pertex® Quantum Ripstop(26g/m²)with fluorocarbon-free DWR
• Insulation: 900FP European goose down with Grangers fluorocarbon-free hydrophobic finish
• Lining: 10D Recycled Atmos™(28gsm)with Thermo Ionic Lining Technology(TILT)

Specifications
• ISO(23537-2:2022)temperature rating: Comfort: 0°C(32°F), Limit of comfort: -6°C(21°F), Extreme: -24°C(-11°F)
Performance
• Lightness: 5/5
• Pack size: 5/5
• Environment use: 2/5
Mythic Ultra Down Sleeping Bag -6°C/21°F

Mythic Ultra Down Sleeping Bag -6°C/21°F

$824.99 $247.50
Mythic Ultra Down Sleeping Bag -6°C/21°F

Mythic Ultra Down Sleeping Bag -6°C/21°F

$824.99 $247.50
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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