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3RD ROCK HIRO Climbing and walking trousers - Oliver is 6ft 2" with a 34" waist, 40" hips and wears a 34/LL M
3RD ROCK HIRO Climbing and walking trousers - Jerome is 5ft 10% with a 30" waist and 37" hips. He is wearing a M. M
3RD ROCK HIRO Climbing and walking trousers - Oliver is 6ft 2" with a 34" waist, 40" hips and wears a 34/LL M
Sid bouldering outdoors in 3RD ROCK Clothing HIRO Trousers. F
3RD ROCK HIRO Climbing and walking trousers - Oliver is 6ft 2" with a 34" waist, 40" hips and wears a 34/LL. M
HIRO
HIRO
3RD ROCK HIRO Climbing and walking trousers - Jessica is 5ft 7" with a 32" inseam and 38.5" hips and wears a size 10. F
HIRO
HIRO
3RD ROCK HIRO Climbing and walking trousers - Oliver is 6ft 2" with a 34" waist, 40" hips and wears a 34/LL M
HIRO
HIRO
Enjoying the view over cheddar Gorge with 3RD ROCK's HIRO and IRIS trousers. F
3RD ROCK HIRO Climbing and walking trousers - Oliver is 6ft 2" with a 34" waist, 40" hips and wears a 34/LL M
Model Info
3RD ROCK HIRO Climbing and walking trousers - Jerome is 5ft 10% with a 30" waist and 37" hips. He is wearing a M. M
Model Info
3RD ROCK HIRO Climbing and walking trousers - Oliver is 6ft 2" with a 34" waist, 40" hips and wears a 34/LL M
Model Info
Sid bouldering outdoors in 3RD ROCK Clothing HIRO Trousers. F
Model Info
3RD ROCK HIRO Climbing and walking trousers - Oliver is 6ft 2" with a 34" waist, 40" hips and wears a 34/LL. M
Model Info
HIRO
Model Info
HIRO
Model Info
3RD ROCK HIRO Climbing and walking trousers - Jessica is 5ft 7" with a 32" inseam and 38.5" hips and wears a size 10. F
Model Info
HIRO
Model Info
HIRO
Model Info
3RD ROCK HIRO Climbing and walking trousers - Oliver is 6ft 2" with a 34" waist, 40" hips and wears a 34/LL M
Model Info
HIRO
Model Info
HIRO
Model Info
Enjoying the view over cheddar Gorge with 3RD ROCK's HIRO and IRIS trousers. F
Model Info

HIRO

Unisex Elasticated Technical Trousers

Regular price £80.00

Tax included

Colour: Plum
Size

Please select the sizing you need below.

Select Category

Find Size Chart For:

Size Chest/Bust Underbust Waist
XXS/UK 6 30 24-26 24
XS/UK 8 32 26-28 26
S/UK 10 34 28-30 28
M/UK 12 36 30-32 30
L/UK 14 38 32-34 32
XL/UK 16 40 34-36 34
XXL/UK 18 42 36-38 36
Size Chest/Bust Underbust Waist
XXS/UK 6 76.5 61-66 61
XS/UK 8 81.6 66-71 66
S/UK 10 86.7 71-76 71
M/UK 12 91.7 76-81.5 76
L/UK 14 96.8 81.5-86.5 81
XL/UK 16 101.9 86.5-91.5 86
XXL/UK 18 107.0 91.5-96.5 91
PREVIOUSLY LABELLED New Size Label Waist Hips Short Inseam (SL) Regular Inseam (RL) Long Inseam (LL)
XXS 24"/UK 6 24 33 30 32 34
XS 26"/UK 8 26 35
S 28"/UK 10 28 37
M 30"/UK 12 30 39
L 32"/UK 14 32 41
XL 34"/UK 16 34 43
XXL 36"/UK 18 36 45
PREVIOUSLY LABELLED NEW SIZE LABEL Waist Hips Short Inseam (SL) Regular Inseam (RL) Long Inseam (LL)
XXS 24"/UK 6 61 84 76.2 81.3 86.4
XS 26"/UK 8 66 89.1
S 28"/UK 10 71.2 94.2
M 30"/UK 12 76.2 99.2
L 32"/UK 14 81.3 104.3
XL 34"/UK 16 86.4 109.4
XXL 36"/UK 18 91.5 114.5

Find Size Chart For:

Size Chest/Bust Waist
XXS 33 26
XS 35 28
S 37 30
M 39 32
L 41 34
XL 43 36
XXL 45 38
Size Chest/Bust Waist
XXS 84 66
XS 88.9 71.1
S 94.0 76.2
M 99.1 81.3
L 104.1 86.4
XL 109.2 91.4
XXL 114.3 96.5
Size Waist Hips Short Inseam (SL) Regular Inseam (RL) Long Inseam (LL)
26"/XXS 26 32 30 32 34
28"/XS 28 34
30"/S 30 36
32"/M 32 38
34"/L 34 40
36"/XL 36 42
38"/XXL 38 44
Size Waist Hips Inseam Short (SL) Inseam Regular (RL) INSEAM LONG (LL)
26"/XXS 66.0 81.3 76.2 81.3 86.4
28"/XS 71.1 86.4
30"/S 76.2 91.4
32"/M 81.3 96.5
34"/L 86.4 101.6
36"/XL 91.4 106.7
38"/XXL 95.5 111.8

Find Size Chart For:

AGE CHEST WAIST HIPS INSEAM HEIGHT
7-8 25 22.5 29 23.5 47
9-10 27.0 23.5 31 25.6 50
11-13 29.5 24 33 27.8 54
WOMEN'S XXS/UK 6 30 24 33 30
AGE CHEST WAIST HIPS INSEAM HEIGHT
7-8 63.5 57.2 73.7 59.7 119.4
9-10 68.6 59.7 78.7 65.0 127.0
11-13 74.9 61.0 83.8 70.6 137.2
WOMEN'S XXS/UK 6 76.2 61.0 83.8 76.2
AGE CHEST WAIST HIPS INSEAM HEIGHT
7-8 25 23 28 23.5 50
9-10 27.0 24.5 29.5 25.6 54
11-13 29.5 26 31.5 27.8 59
MEN'S XXS 33 26 32 30
AGE CHEST WAIST HIPS INSEAM HEIGHT
7-8 63.5 58.4 71.1 59.7 127.0
9-10 68.6 62.2 74.9 65.0 137.2
11-13 74.9 66.0 80.0 70.6 149.9
MEN'S XXS 83.8 66.0 81.3 76.2
Size guide
Leg Length

Why we made it

Holding out for a Hiro ‘till the end of the night? Practical, flexible and stylish - what more could you want from your trousers. 💪

Slim fit, Unisex Trousers are the ultimate trousers of versatility, and they pack a technical punch. Designed 4 new colourways, these trousers not only boast a stylish action-commuter look, but also offer multi-seasonal 4 way stretch moisture controlling (and shower proof!) fabric. 🍂☀️☃️🌷

Made from 90% recycled nylon and 10% elastane, the Hiro trousers are functional and fun - donning an elasticated waistband for all those moves on your adventures while performing your best!

Features deep front pocket and side zip pockets , the Hiros have your back in all weathers and climbs. They’re gonna be your adventure go-to for many years to come!

Why we love it

All year round slim-fit trousers - extra flex for comfort and durability

Both wicking and shower resistant for those unpredictable weather days

Movement enhanced trousers with elasticated waistband and articulated knees for extra movement

Deep front and side zipped pockets

Now available in short leg and long leg as well as regular

4 new colourways

Size & Fit

Luke is 6ft with a 34" waist and wears a size 34/RL
Billy is 5ft 11" with a 30" waist and wears a 30/RL.
True to size, slimfit. 

Fabric & care

90% Recycled Nylon
10% Elastane
Save the climate and wash cold.
Avoid fabric conditioner.
Wash with similar colours.

Shipping & Delivery
UK
  • Royal Mail 48 hours: £3.50
  • Royal Mail 24 hours: £4.50
  • Next Day delivery: £8.50

Free UK Shipping over £80.
EU

Rates start from €3.99 and don't normally exceed €9.99. Weight can also affect the delivery rate charged.

Free EU Shipping over €150. 

Orders under €150 will be sent via IOSS though 3RD ROCK takes no responsibility for any local fees incurred
Rest of world

Rates vary depending on country, parcel weight and method. Shipping rates don't generally exceed £15.99

Free ROW shipping on orders over $200

Sustainably 3RD ROCK

Sustainability

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Manufacturing

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Materials & fibres

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Design & concepts

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3RD ROCK in the wild

OCEAN CO

Purchasing this product prevents helps fund preventing ocean bound plastics from entering the ocean.

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