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O2 Waterproof 20k Trail Pants
The O2 Waterproof 20k Trail Pants are ultralight waterproof, breathable and windproof pants, designed for trail running. Manufactured with the 2.5-layer O2 membrane, waterproof (20,000mm H2O column) and highly breathable (20,000g/m²·24h). 100% thermosealed seams, YKK™ AquaGuard® zippers. Foldable into its own pocket, the O2 Pants are ideal for competitions and high intensity training sessions in the rain.
FAST&LIGHT - 121g (XS)
Activity
Trail Running
Features
30 cm YKK™ AquaGuard® self-closing zippers
Double adjustment system at the bottom (zip + elastic)
One-hand puller for easy-grip back pocket with gloves
Custom Lace waist adjustment system (elastic + precision lacing)
Folds into its own back pocket
Top layer fit: pattern to be worn over other garments
Exceeds Ultra Trail races mandatory equipment requirements (such as UTMB)
Weight
XS Size - 121 grams
S Size - 126 grams
M Size - 131 grams
L Size - 136 grams
XL Size - 141 grams
Fabric
O2 2.5 layers
66% Nylon 34% Polyurethane, 20D*20D, 63g/m². Ripstop.
Waterproof: 20,000mm of water column (TEST JIS L1092: 2009 - 7.1.2)
Breathability: 20,000g/(m² 24h) (TEST JIS L1099: 2006 METHOD B1).
DWR C6 (Durable Water Repellency) 80/20 treatment.
Note: avoid direct contact with deodorants, makeup or sun creams as they can contaminate the membrane.
Size
Recommended Size (Height/Weight) considering these pants are worn over other pants; otherwise, the size could be one smaller
cm / kg | 155 | 160 | 165 | 170 | 175 | 180 | 185 | 190 | 195 |
50 | XS | XS | XS | ||||||
55 | XS | XS | XS | S | |||||
60 | XS | XS | XS | S | M | ||||
65 | S | S | M | M | L | ||||
70 | S | M | M | L | L | ||||
75 | M | L | L | L | XL | ||||
80 | L | L | XL | XL | XL | ||||
85 | XL | XL | XL | XL | |||||
90 | XL | XL | XL |
Maintenance
For O2 membranes - 2.5 layers follow these recommendations:
1. It is important to wash the garment regularly, especially after having been used in an intense aerobic situation with sweat, or after having been exposed to any chemical substance that could affect its properties.
2. Wash the garment alone or with other breathable waterproof garments. Wash the right side item.
3. Machine wash (never hand wash) in cold water at 30ºC.
4. Do not use fabric softeners.
5. Use liquid detergent, forbidden to use bleach, avoid powder detergents.
6. To increase the duration of the garment and its properties, we recommend the use of specific Nikwax® products
7. Rinse several times (at least two rinse cycles) if necessary: although it may seem strange, the garment should not smell of soap.
Specific References
- ean13
- 8435422221917
This product is also available in pack
Reviews (1) - Review moderation

Los compré porque me los pedían en una carrera y pensé que nunca los tendría que utilizar. Lo cierto es que ni ocupan ni pesan nada. Pero desde que los tengo los he utilizado en varias carreras e incluso entrenos y la verdad es que los llevo muy a gusto, tienen un patrón cómodo y el agua no entra por ningún lado.

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- MenuBack
- MEN
- PRODUCTSPRODUCTS
- Base Layer
- Pants
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- ACTIVITIESACTIVITIES
- ALPINISM
- SKIMO
- CLIMBING
- TRAIL RUNNING
- CATEGORIESCATEGORIES
- FAST&LIGHT
- WATERPROOF
- INSULATION
- WOMEN
- PRODUCTSPRODUCTS
- BASE LAYER
- Pants
- Jackets
- Packs
- ACTIVITIESACTIVITIES
- ALPINISM
- SKIMO
- CLIMBING
- TRAIL RUNNING
- CATEGORIESCATEGORIES
- FAST&LIGHT
- INSULATION
- WATERPROOF
- ACCESORIES
- Socks
- Headwear
- Care and maintenance
- Gloves
- Running vests and belts
- Softflask
- Underwear
- PACKS
- ABOUT OS2O
- CUSTOMER SERVICESCUSTOMER SERVICES
- From Monday to FridayFrom Monday to Friday
- 11:00-14:00 & 18:00-20:0011:00-14:00 & 18:00-20:00
- +34 974 258 592
- ventas@os2o.com
- OS2O JACA
- STORIES
- PROFILE